USBridge KVM 2.0 | Ultra-Low Latency IP KVM

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Overview

System frozen or won't boot? The KVM is still there.

The USBridge KVM 2.0 is an out-of-band remote management appliance operating at hardware Level 0. Whether you need BIOS/UEFI setup, boot-loader rescue, an OS reinstallation, or remote reboot of an unresponsive bare-metal server, USBridge KVM bypasses the host operating system entirely.

Engineered with the Moonlight streaming protocol, it delivers smooth 1080p @ 60 FPS with ~45 ms ultra-low latency, peripheral passthrough, hardware-isolated immutable Btrfs storage snapshots, and an on-device OCR engine with an MCP server for autonomous AI administration.

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Choose Your KVM: Four Devices, One KVM OS

Every edition runs the same unified USBridge KVM OS with regular OTA updates, REST API, Moonlight engine, and client compatibility.

Feature	USBridge Nano	USBridge KVM 2.0 Low	USBridge KVM 2.0 Standard	USBridge KVM 2.0 Full
Price	$89	$99	$117	$139
Target Use	Ultra-compact pocket KVM	Minimalist board for server racks	Complete ready-to-run desktop kit	Ultimate Pro kit with ATX & screen
Base Board	Sipeed NanoKVM (SG2002)	Radxa Zero 3W	Radxa Zero 3W	Radxa Zero 3W
Processor	1 RISC-V core @ 1.0 GHz	4 Cortex-A55 cores @ 1.6 GHz	4 Cortex-A55 cores @ 1.6 GHz	4 Cortex-A55 cores @ 1.6 GHz
RAM	256 MB DDR3	1 GB LPDDR4	1 GB LPDDR4	1 GB LPDDR4
Video Capture	Built-in HDMI (MIPI CSI)	USB 3.0 Dongle (1080p 60 FPS)	USB 3.0 Dongle (1080p 60 FPS)	USB 3.0 Dongle (1080p 60 FPS)
Video Stream	1080p @ 60 FPS	1080p @ 60 FPS	1080p @ 60 FPS	1080p @ 60 FPS
Network	Ethernet port (RJ45)	Wi-Fi 6 (Ethernet via USB hub)	Wi-Fi 6 (Ethernet via USB hub)	Wi-Fi 6 (Ethernet via USB hub)
Status Screen	128×64 Mono OLED	—	240×240 IPS Color Display	240×240 IPS Color Display
Enclosure	Custom compact case	Bare board + Heatsink	Custom case	Custom case
Dimensions	49 × 41 × 41 mm	Minimal footprint	69 × 36 × 34 mm	69 × 36 × 34 mm
ATX Power Control	—	Optional expansion	Optional expansion	Included (ATX board + wires)
MicroSD with OS	Included	Optional	Included	Included
Lifetime OS License	Included	Included	Included	Included

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Already Have a Board? Install USBridge Firmware

Turn standard off-the-shelf single-board computers into an enterprise-grade out-of-band management appliance. Flash USBridge onto a board you already have — same client apps, same API, and same OTA updates on every one.

	Radxa Zero 3W / 3E	Radxa Cubie A7Z	Sipeed NanoKVM
What it is	SBC + USB 3.0 capture card	SBC + USB 3.0 capture card	Off-the-shelf KVM, reflashed
SoC	Rockchip RK3566, 4 cores	Allwinner A733, 8 cores	SOPHGO SG2002, 1 RISC-V core
Video capture	USB 3.0 (UVC) · MIPI coming	USB 3.0 (UVC) · MIPI coming	MIPI CSI (built-in HDMI)
Video	1080p60	1080p60 · up to 4K30 on MIPI (coming)	1080p60
Codecs	H.264, HEVC	H.264, HEVC	H.264, HEVC
Latency	USB: +10–15 ms vs MIPI · MIPI: lowest	USB: +10–15 ms vs MIPI · MIPI: lowest	Lowest (MIPI)
BIOS-in-Terminal (OCR)	✅ NPU	✅ CPU	—
Status display	3W: ✅ 240×240 color LCD + monitor mode · 3E: not yet	✅ 240×240 color LCD + monitor mode	✅ built-in 128×64 mono OLED, status only
Get it	Download firmware ➔	Download firmware ➔	Download firmware ➔

Full side-by-side — latency, audio, codecs, storage, every feature: NanoKVM vs Radxa Zero 3W vs Cubie A7Z ➔
Raspberry Pi and Banana Pi support is in development.

👉 Flashing guides: Flashing & Recovery Guide · Flash-Tool Directory

Connecting After Flashing:

• Default USB Gadget IP: 10.55.0.1
  Connect the board to your PC via USB. Open http://10.55.0.1 in any browser for immediate pairing, setup QR code, Moonlight PIN, and Wi-Fi configuration.
• Auto-Discovery: In the desktop USBridge Client, click + ➔ Over USB to pair with the board automatically.

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Key Features

Zero Latency Streaming

• 45 ms latency: Sub-frame hardware encoding guarantees an imperceptible delay between physical input and visual response.
• 60 FPS stream: High-refresh-rate remote rendering for precise cursor control and fluid UI navigation.
• Zero dropped frames: Hardware-level network optimization ensures continuous frame delivery even under high bandwidth loads.

Access From Anywhere

One client on every device: a computer, a phone or just a browser.

• Cross-platform native apps for Windows, macOS, Linux, iOS, and Android.
• Browser access: via web.usbridge.io, or directly from the web client hosted on the KVM itself — fully operational offline.
• Built-in Tailscale: reach your machine from anywhere across encrypted peer-to-peer mesh with no port forwarding or public IP required.
• Unified control: the same client also runs USBridge software agents for computers without dedicated KVM hardware.

Virtual Media

No more USB sticks: an image connects to the computer as a real USB drive.

• ISO mounting as CD/DVD drive: install any operating system straight from BIOS/UEFI.
• Direct disk booting: mount IMG, VDI, VMDK images and entire host drives as bootable physical storage.
• Zero pre-upload delay: streams directly from your computer with high-speed RAM caching for instant boot times.
• Write protection: Overlay mode redirects every write operation to a separate temporary layer, keeping your source image pristine and untouched.

Peripheral Emulation

The computer sees ordinary USB devices, with no drivers or setup.

• Immediate keyboard response: works from the first second in BIOS, UEFI, and bootloader environments.
• Precise mouse control: absolute 1:1 pointer tracking, relative mode for legacy systems, plus multi-touch and stylus support.
• Gamepad passthrough: emulates standard Xbox 360 controller (XInput) or generic DirectInput.
• Audio & Network: host sound forwarded to your side (audio redirection), microphone passthrough to the host, and USB gadget Ethernet when an OS installer lacks native NIC drivers.

Storage with Snapshots

Images and files on the microSD inside the KVM are safe from deletion and ransomware.

• Automated snapshots: 30 seconds after file write activity stops, the KVM takes a read-only snapshot autonomously.
• Hardware-isolated immutability: even with host root privileges, compromised systems cannot alter or erase completed snapshots (security reference).
• Instant rollback: need an older file? Mount any snapshot directly to copy data; the integrated log shows exact change history.
• Standard Btrfs filesystem: any Linux workstation can read the microSD card directly.

BIOS as Text Over SSH

The KVM reads the screen on the device itself and shows the BIOS in a normal terminal.

• Direct SSH access: connect via ssh user@<kvm-ip> — no browser, no heavy video stream required.
• Plain text clipboard: copy POST codes, hardware serial numbers, and MAC addresses straight from the console.
• Keyboard navigation: browse menus using standard arrow keys, Enter, and Esc just like a physical serial console.
• 100% on-device OCR: optical character recognition executes entirely on local KVM hardware without cloud dependencies.

Scripts & AI Agents

Scripts and AI see the screen as text, so BIOS chores can be automated.

• Starlark scripting (Python syntax): write straightforward automation scripts that wait for target screen text and trigger deterministic keystrokes.
• Flexible execution: trigger scripts directly from the client interface, on-device display, or over the REST API.
• Built-in MCP server: integrate external AI models (such as Claude) via the Model Context Protocol (MCP) to visually inspect screens, navigate BIOS menus, and mount rescue ISOs autonomously.
• Unattended end-to-end workflows: automated OS deployments from initial boot-override selection through partition setup to final reboot without human intervention.

Power Control

Power on, power off and hard reset, even when the computer is completely frozen.

• Direct motherboard integration: dedicated ATX board bridges directly into motherboard Front Panel Power and Reset headers.
• Status telemetry: real-time Power LED and HDD activity LED feedback inside the client UI.
• Galvanic isolation: rated up to 3.75 kV isolation to shield the KVM from ground loops, electrical surges, and motherboard noise.
• Accidental trigger safety: actions require hold-to-confirm in the UI, ensuring production servers never reboot by accident.

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Client Downloads

Manage your hardware KVMs and software agents from a single unified application.

Unified Installer (Client + Software Agent):
Windows Setup (.exe) · macOS Apple Silicon (.dmg)

Platform	Installer	Portable / Alternative	Store / Package Manager
Windows (x86_64)	Setup (.exe)	Portable (.zip)	—
macOS (Apple Silicon)	Disk Image (.dmg)	—	—
Linux (x86_64)	Debian / Ubuntu (.deb) Fedora / RHEL (.rpm) Arch (.pkg.tar.zst)	AppImage	APT / DNF / pacman repo Snap Store
Android (ARM64)	APK (self-updating)	—	Google Play
iOS / iPadOS	—	—	Apple App Store
Web Browser	—	Open web.usbridge.io	Works in Chrome, Edge, Safari, Firefox

For terminal install commands and headless deployment, see the USBridge-Remote Repository.

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Comparison: USBridge KVM 2.0 vs Other IP KVM Solutions

Feature	JetKVM Mini	USBridge KVM 2.0	PiKVM V4 Mini	TinyPilot Voyager 3
Price	$39	from $99	from $252	$399
Video Resolution & Rate	1080p @ 30 / 720p @ 60	1080p @ 60 FPS	1920 × 1200 @ 60 FPS	1920 × 1200 @ 60 FPS
Video Latency	Not stated	~45 ms (Moonlight)	Not stated	80–100 ms
Network Interfaces	100 Mbps Ethernet / Wi-Fi	Wi-Fi 6, Ethernet via USB	Gigabit Ethernet	Gigabit Ethernet
ATX Power Control	❌	✅ Included in Full (Isolated)	✅	❌
Virtual Media (ISO/IMG)	✅	✅ Fast RAM cache + Overlay	✅	✅
On-Device Status Screen	✅	✅ 240×240 IPS Color	✅	✅
Immutable Storage Snapshots	❌	✅ Btrfs Read-Only Snapshots	❌	❌
BIOS-in-Terminal & AI (OCR, MCP)	❌	✅ Local OCR + MCP Server	❌	Paid license

[!NOTE] What about the USBridge Nano? The USBridge Nano ($89) is an ultra-compact pocket appliance based on the Sipeed SG2002 RISC-V SoC with native MIPI CSI HDMI capture. It is intended for administrators seeking the smallest form factor with built-in Ethernet, running the same USBridge OS streaming core.

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Technical Specifications & Quick Start Guides

1. USBridge Nano — Setup & Specifications (Ultra-Compact Pocket KVM)

Technical Specifications

Specification	Details
Board	Sipeed NanoKVM (SG2002)
Processor	RISC-V C906, 1 core, 1 GHz
Memory	256 MB DDR3
Video	HDMI capture, 1080p 60 FPS
Control	USB HID keyboard and mouse, virtual ISO drive, gamepads
Audio	Audio output and microphone in both directions
Network	100 Mbit Ethernet port
Remote Access	USBridge Client, web interface, Tailscale P2P, Moonlight
Power	USB-C
Screen	128×64 Mono OLED
Dimensions with Case	49 × 41 × 41 mm
System	USBridge OS on the included MicroSD card

Set Up in 3 Steps

1. HDMI: Connect HDMI cable from target computer video out directly to the Nano HDMI port.
2. USB-C: Connect USB-C cable from Nano to the computer. It powers the Nano and emulates keyboard, mouse, and virtual media.
3. Ethernet: Plug network cable from your router/switch into the 100 Mbit Ethernet port.

2. USBridge KVM 2.0 Low — Setup & Specifications (Minimalist Board for Server Racks)

Technical Specifications

Specification	Details
Board	Radxa Zero 3W
Processor	Rockchip RK3566, 4 Cortex-A55 cores up to 1.6 GHz
Memory	1 GB LPDDR4
Video	HDMI capture, 1080p 60 FPS, about 45 ms latency
Control	USB HID keyboard and mouse, gamepads, virtual drive for ISO, IMG, VDI, VMDK
Audio	Audio from the computer
Network	Onboard Wi-Fi 6 and Bluetooth. Ethernet through a USB hub with a network port (hub not included)
Remote Access	USBridge Client, web interface, Tailscale P2P
Power	USB-C
Ports	USB-C 2.0 (to the computer), USB-C 3.0 (capture dongle), Micro HDMI
Case	No case, bare board with heatsink
Cooling	Passive, aluminum heatsink
MicroSD Card	Not included, +$5 optional
System	USBridge KVM OS, Btrfs snapshots, over-the-air updates

Set Up in 3 Steps

1. HDMI: HDMI cable from the computer to the video capture dongle on the KVM.
2. USB-C (OTG): Connect USB-C cable to the target computer for power and peripheral emulation.
3. Network: Connect via Wi-Fi 6, USB Ethernet adapter, or USB gadget mode (10.55.0.1).

3. USBridge KVM 2.0 Standard — Setup & Specifications (Complete Desktop Kit)

Technical Specifications

Specification	Details
Board	Radxa Zero 3W
Processor	Rockchip RK3566, 4 Cortex-A55 cores up to 1.6 GHz
Memory	1 GB LPDDR4
Video	HDMI capture, 1080p 60 FPS, about 45 ms latency
Control	USB HID keyboard and mouse, gamepads, virtual drive for ISO, IMG, VDI, VMDK
Audio	Audio from the computer
Network	Onboard Wi-Fi 6 and Bluetooth. Ethernet through a USB hub with a network port (hub not included)
Remote Access	USBridge Client, web interface, Tailscale P2P
Power	USB-C
Ports	USB-C 2.0 (to the computer), USB-C 3.0 (capture dongle), Micro HDMI, 8-pin header for the ATX board
Case	Custom case
Screen	1.3" full-color IPS, 240×240 (ST7789, SPI), 3 buttons and a 5-way joystick
Dimensions with Case	69 × 36 × 34 mm
MicroSD Card	With USBridge KVM OS, included
System	USBridge KVM OS, Btrfs snapshots, over-the-air updates

Set Up in 3 Steps

1. HDMI: Connect HDMI cable from computer GPU output to the included capture dongle.
2. USB-C (Port 1): Link Port 1 to the host computer for power, keyboard, mouse, and virtual drives.
3. Network: Pair via onboard Wi-Fi 6 using the interactive status screen or connect over USB (10.55.0.1).

4. USBridge KVM 2.0 Full — Setup & Specifications (Ultimate Pro Kit + ATX)

Technical Specifications

Specification	Details
Board	Radxa Zero 3W
Processor	Rockchip RK3566, 4 Cortex-A55 cores up to 1.6 GHz
Memory	1 GB LPDDR4
Video	HDMI capture, 1080p 60 FPS, about 45 ms latency
Control	USB HID keyboard and mouse, gamepads, virtual drive for ISO, IMG, VDI, VMDK
Audio	Audio from the computer
Network	Onboard Wi-Fi 6 and Bluetooth. Ethernet through a USB hub with a network port (hub not included)
Remote Access	USBridge Client, web interface, Tailscale P2P
Power	USB-C
Ports	USB-C 2.0 (to the computer), USB-C 3.0 (capture dongle), Micro HDMI, 8-pin header for the ATX board
Case	Custom case
Screen	1.3" full-color IPS, 240×240 (ST7789, SPI), 3 buttons and a 5-way joystick
ATX Power	Power on, power off (normal and forced), reset. Optocoupler (galvanic isolation). ATX, Micro-ATX, Mini-ITX
Dimensions with Case	69 × 36 × 34 mm
Cooling	Passive, aluminum heatsink
MicroSD Card	With USBridge KVM OS, included
System	USBridge KVM OS, Btrfs snapshots, over-the-air updates

Set Up in 4 Steps

1. HDMI: Connect HDMI cable from target computer GPU/motherboard to the capture dongle.
2. USB-C (Port 1): Connect Port 1 to computer USB port for power, input emulation, and virtual storage.
3. ATX Control Board: Plug the ribbon cable into KVM 8-pin GPIO, then bridge jumper wires to motherboard Front Panel (PWR_SW, RESET, P_LED, H_LED).
4. Network: Configure Wi-Fi 6 via the on-device display/joystick or connect directly over USB gadget mode.

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DIY KVM Setup: Full BIOS Control in 3 Minutes

Provision a supported SBC, flash the firmware image, and connect a standard USB capture interface to deploy your own IP-KVM.

1. Hardware Checklist (Bill of Materials)

Component	Description
Supported SBC	Radxa Zero 3W / 3E, Radxa Cubie A7Z; also the off-the-shelf Sipeed NanoKVM (HDMI capture built in). Which to pick: board comparison.
HDMI-to-USB Capture Card	Generic MS2109 (7–12$), or standard UVC dongle.
MicroSD Card (2GB+)	Standard 2GB+ capacity. Class 10 or higher recommended for fast boot times.
Optional: Status Screen	1.3" 240×240 LCD: the USBridge 1.3" LCD Flip-HAT (mirrored pinout, SoC stays against the heatsink) or the standard Waveshare 1.3" LCD HAT. Fits both the Radxa Zero 3W and the Cubie A7Z; not supported on the Zero 3E yet. Fully optional: the system runs headless via a single config file.

2. 3-Minute Flashing Guide (Video Tutorial)

Watch the complete guide on how to flash the firmware and perform the first boot.

Quick Links for Setup:

• Step-by-step Flashing Guide
• Headless Provisioning Guide
• Full Documentation

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Accessories

Accessory	Description	Details
Screen Module (Flip-HAT 1.3" LCD)	240×240 IPS status screen designed specifically for Zero-factor boards. Mounts on the back of the PCB so the CPU remains open for large heatsinks and active cooling.	LCD Flip-HAT Specs
Power Control Board (ATX)	Galvanically isolated (up to 3.75 kV) front-panel adapter board for Power, Reset, Power LED, and HDD LED headers.	ATX Board Guide
HDMI Capture Dongle (1080p @ 60 FPS)	High-throughput UVC video capture card optimized for USB 3.0 [5G] mode and sub-frame hardware encoding.	Capture Dongle Specs

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Unified Ecosystem: USBridge-Remote

Control your entire infrastructure from a single point using USBridge-Remote — our dedicated cross-platform agent application. It enables a hybrid access approach within a single interface, combining hardware and software-level management:

• Hardware Level (Layer 0): Add USBridge-KVM devices for direct BIOS access, virtual media mounting, and bare-metal recovery of unresponsive machines.
• Software Level (OS-level): Deploy this lightweight software agent inside an already booted operating system for high-performance desktop management without KVM hardware dependency.

Multi-Protocol & Streamer Engine Support

The USBridge Agent features a modular streaming architecture allowing you to switch between streaming engines on the fly based on your latency, hardware encoder, and workflow requirements:

• USBridge Streamer (Free & Pro): Our proprietary ultra-low latency engine optimized for NVENC/VAAPI/Apple Silicon hardware encoding, virtual displays, seamless USB device passthrough, and WebRTC browser streaming.
• Sunshine: Native support for the popular open-source GameStream host implementation.
• Punktfunk: High-speed, lightweight open-source remote access protocol.
• Vibepollo: Optimized protocol for specialized streaming pipelines and low-overhead control.

Agent Download Matrix

The agent runs as a background service on your target OS (servers, remote workstations, or headless nodes) to stream the desktop and execute system-level commands.

Platform	Downloads	Store / Package Manager
Windows (x86_64)	Setup (.exe) Portable (.zip)	Windows Service background autostart
macOS (Apple Silicon)	Disk image (.dmg)	macOS background daemon
Linux (x86_64)	Debian / Ubuntu (.deb) Fedora / RHEL (.rpm) Arch (.pkg.tar.zst) AppImage (portable)	Systemd service

More on the Agent: USBridge-Remote Repository.

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Documentation & Hardware Reference

Complete technical guides are located in the docs/ directory:

• Getting Started & Provisioning — Quick start, network configuration, and headless bulk setup.
• BIOS-in-Terminal & OCR — Local OCR engine, SSH terminal access, and Starlark scripting.
• Snapshots & Storage Management — Btrfs snapshots, rollback, and security.
• Virtual Media Mounting — Mounting ISOs, bootable disks, and RAM cache.
• Hardware Reference & Pinouts — Architecture, board comparison, and power thermal guidelines.
• Developer REST API — Full API reference for headless integrations and custom scripting.
• Hardware Models & Schematics — PCB files and 3D printable STL/STEP enclosures.

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Community & Independent Reviews

Creator / Channel	Review / Tutorial	Link
Learn To HomeLab	Is This The Best KVM On The Market?	Watch Review
Barmine Tech	The Best KVM I've Used? USBridge KVM 2.0 (Independent Review)	Watch Review
Jonatan Castro	Unboxing & What's in the box (Spanish)	Watch Review
USBridge Official	NanoKVM with USBridge firmware: 60 FPS instead of lag	Watch on YouTube
USBridge Official	Official Overview & Feature Walkthrough	Watch on YouTube
USBridge Official	Assembly & Packaging of USBridge KVM 2.0	Watch on YouTube

Join our community on Discord and Reddit to discuss homelab setups, custom automation scripts, and firmware updates!