What Is the USB-EXB330-K?
The OREI USB-EXB330-K is a USB 2.0 over CAT6 / CAT7 extender kit. It extends USB 2.0 signals up to 330ft / 100m over a single CAT cable, allowing USB devices such as printers, USB drives, hard drives, and other USB peripherals to be used remotely from a connected computer.
The kit includes one Transmitter, one Receiver, one USB-B to USB-A cable, one 12V/1A locking power adapter, and a user manual. The computer connects to the Transmitter using the included USB cable, the Receiver connects to the remote USB devices through two USB-A ports, and a CAT5e / CAT6 / CAT7 cable connects the Transmitter to the Receiver.
The USB-EXB330-K supports USB 2.0 protocol, transmission rates up to 200Mbps, two USB 2.0 device outputs, plug-and-play operation with no driver installation, and Power over Cable so only one power adapter is required for the setup. It extends USB signals up to 100m / 328ft over CAT6 / CAT7 cable.
The USB-EXB330-K is useful for offices, classrooms, conference rooms, AV racks, production rooms, security setups, retail counters, industrial workstations, and installations where USB devices need to be controlled from a remote computer location.
IMPORTANT — USB-EXB330-K Extends USB Only
The USB-EXB330-K is a USB extender.
It does not extend:
- HDMI video
- DisplayPort video
- Audio/video signals
- Ethernet internet
- IR control
- RS-232 control
- KVM video switching
It is designed to extend USB 2.0 data from a computer to remote USB devices over CAT cable.
IMPORTANT — Supports USB 2.0
The USB-EXB330-K supports USB 2.0 protocol.
| USB Feature | Support |
| USB 2.0 | Supported |
| Transmission rate | Up to 200Mbps |
| USB-A device ports on Receiver | 2 |
| USB-B host connection on Transmitter | 1 |
| Plug and play | Supported |
| Driver installation | Not required |
This model is best for USB 2.0 devices that do not require USB 3.0 bandwidth.
IMPORTANT — Extends USB up to 330ft / 100m
The USB-EXB330-K extends USB signals up to 330ft / 100m.
| Cable Type | Maximum Distance |
| CAT5e | Supported |
| CAT6 | Recommended |
| CAT7 | Supported |
| Maximum distance | 330ft / 100m |
For best performance, use high-quality CAT6 cable.
Poor CAT cable, weak terminations, damaged connectors, couplers, or low-quality patch paths may cause USB devices not to detect, disconnect, or transfer data slowly.
IMPORTANT — Use Direct CAT Cable Connection
Connect the Transmitter CAT port directly to the Receiver CAT port using CAT5e / CAT6 / CAT7 cable.
Do not connect the CAT cable through:
- Network switch
- Router
- Internet network
- LAN switch
- Standard Ethernet network
This model does not work over a network switch. It requires a direct connection between the Transmitter and Receiver.
IMPORTANT — Two USB Device Ports Are on the Receiver
The Receiver includes two USB 2.0 ports.
| Receiver Port | Function |
| USB 2.0 Port 1 | Connect USB device |
| USB 2.0 Port 2 | Connect USB device |
Compatible examples include:
- USB printer
- USB drive
- USB hard disk
- USB keyboard
- USB mouse
- USB scanner
- Other USB 2.0 devices
The manual specifically mentions USB drives, printers, pen drives, and hard disks as supported device examples.
IMPORTANT — Power over Cable Is Supported
The USB-EXB330-K supports Power over Cable.
| Power Setup | Support |
| One power adapter required | Supported |
| Power adapter at one end only | Supported |
| Included adapter | 12V/1A locking power adapter |
| Transmitter power consumption | 1.3W |
| Receiver power consumption | 2.3W |
Only one power adapter is required to power the whole setup.
IMPORTANT — Plug-and-Play Setup
The USB-EXB330-K is plug and play.
No software or driver installation is required.
Connect the computer, Transmitter, CAT cable, Receiver, USB devices, and power adapter. The connected USB devices should then appear on the computer as if they were connected locally.
Ports and Panel Layout
| Port / Indicator | Unit | Function |
| USB TO PC | Transmitter | Connect to the USB port of a computer using the included USB-B to USB-A cable |
| POWER LED | Transmitter | Green LED lights when the Transmitter is powered |
| DC 12V | Transmitter | Connect the 12V/1A power adapter |
| CAT Port | Transmitter | Connect CAT5e / CAT6 / CAT7 cable to Receiver |
| USB 2.0 Ports | Receiver | Connect USB devices such as printer, USB drive, or hard disk |
| POWER LED | Receiver | Green LED lights when the Receiver is powered |
| DC 12V | Receiver | Connect the 12V/1A power adapter if powering from Receiver side |
| CAT Port | Receiver | Connect CAT5e / CAT6 / CAT7 cable from Transmitter |
Step-by-Step Setup
- Connect the included USB-B to USB-A cable from the computer to the USB TO PC port on the Transmitter.
- Connect CAT5e / CAT6 / CAT7 cable from the Transmitter CAT port to the Receiver CAT port.
- Connect USB devices to the two USB 2.0 ports on the Receiver.
- Connect the included 12V/1A locking power adapter to one side of the system.
- Power on the computer and connected USB devices.
- Check that the green POWER LEDs are on.
- Confirm that the USB devices are detected by the computer.
- Test device function, such as printing, file access, keyboard/mouse control, or USB device communication.
CAT Cable Requirement — Critical
Use high-quality CAT5e / CAT6 / CAT7 cable.
| Requirement | Specification |
| Cable type | CAT5e / CAT6 / CAT7 |
| Recommended cable | CAT6 |
| Maximum distance | 330ft / 100m |
| Connection | Direct Transmitter-to-Receiver connection |
Poor CAT cable may cause:
- USB device not detected
- USB drive not accessible
- Printer not responding
- Slow data transfer
- Device disconnecting
- Power or link issues
- Unstable USB operation
Use a direct cable run whenever possible.
USB Cable Requirement — Critical
Use the included USB-B to USB-A cable to connect the computer to the Transmitter.
| Connection | Cable |
| Computer to Transmitter | USB-B male to USB-A male cable |
| Included cable length | 1m |
Poor USB cables may cause the computer not to detect the extender or connected USB devices.
Power Requirement — Critical
The USB-EXB330-K uses a DC 12V/1A locking power adapter.
| Power Detail | Value |
| Power adapter input | AC 100–240V, 50/60Hz |
| Power adapter output | DC 12V/1A |
| Transmitter power consumption | 1.3W |
| Receiver power consumption | 2.3W |
| Power over Cable | Supported |
If the POWER LED does not turn on, check the power adapter, outlet, and DC 12V connection.
Understanding the Transmitter
The Transmitter is installed near the computer.
It has:
- USB TO PC port
- CAT port
- DC 12V input
- Green POWER LED
The Transmitter receives the USB signal from the computer and sends it over CAT cable to the Receiver.
Understanding the Receiver
The Receiver is installed near the remote USB devices.
It has:
- Two USB 2.0 device ports
- CAT port
- DC 12V input
- Green POWER LED
The Receiver allows two USB devices to connect remotely to the computer.
Understanding the Application Example
The application diagram on page 9 shows a PC connected to the Transmitter using the USB TO PC port. A CAT5e / CAT6 cable runs up to 100m from the Transmitter to the Receiver. The Receiver then connects to a USB drive and printer through its two USB 2.0 ports. This shows the main use case: controlling or accessing USB devices remotely from a computer.
Supported Technical Specifications
| Specification | Support |
| Product Type | USB 2.0 over CAT6 / CAT7 extender |
| USB Protocol | USB 2.0 |
| Transmission Rate | Up to 200Mbps |
| Transmission Distance | 100m / 328ft |
| CAT Cable | CAT5e / CAT6 / CAT7 |
| Network Switch Support | Not supported |
| Plug and Play | Supported |
| Driver Installation | Not required |
| Transmitter Input | USB-B female |
| Transmitter Output | CAT RJ45 |
| Receiver Input | CAT RJ45 |
| Receiver Output | 2 x USB-A female |
| Power Supply | DC 12V/1A locking power adapter |
| Power over Cable | Supported |
| Transmitter Power Consumption | 1.3W |
| Receiver Power Consumption | 2.3W |
| Housing | Metal enclosure |
| Color | Black |
| Dimensions | 82mm x 49mm x 20mm |
| Weight | Transmitter / Receiver: 100g / 3.5oz |
| Operating Temperature | 0°C to 40°C / 32°F to 104°F |
| Storage Temperature | -20°C to 60°C / -4°F to 140°F |
| Relative Humidity | 20–90% RH, non-condensing |
| ESD Protection | ±8kV air-gap, ±4kV contact |
What Computers Is the USB-EXB330-K Compatible With?
The USB-EXB330-K can connect to computers with a USB-A port, including:
- Desktop PCs
- Laptops
- Workstations
- Control room computers
- AV rack computers
- Office computers
- Classroom computers
- Security monitoring computers
The computer connects to the Transmitter using the included USB-B to USB-A cable.
What USB Devices Is the USB-EXB330-K Compatible With?
The Receiver can connect to USB 2.0 devices such as:
- USB printers
- USB drives
- USB hard disks
- Pen drives
- Keyboards
- Mice
- Scanners
- USB control devices
- Other USB 2.0 peripherals
For high-bandwidth USB 3.0 devices, performance will be limited to USB 2.0 speed because this model supports USB 2.0.
Frequently Asked Questions
Q: What is the OREI USB-EXB330-K used for?
A: It is used to extend USB 2.0 devices up to 330ft / 100m over CAT5e / CAT6 / CAT7 cable.
Q: Does the USB-EXB330-K extend video?
A: No. It extends USB data only.
Q: Does it support HDMI?
A: No. This is not an HDMI extender.
Q: Does it support USB 2.0?
A: Yes. It supports USB 2.0 protocol.
Q: Does it support USB 3.0?
A: No. USB 3.0 is not listed for this model.
Q: What transmission rate does it support?
A: It supports transmission rates up to 200Mbps.
Q: How far can it extend USB?
A: It extends USB up to 330ft / 100m.
Q: What CAT cable should I use?
A: Use CAT5e, CAT6, or CAT7 cable. CAT6 is recommended.
Q: Can I connect it through a network switch?
A: No. It requires a direct CAT cable connection between the Transmitter and Receiver.
Q: Is this an Ethernet device?
A: No. It uses CAT cable as a direct USB extension cable.
Q: How many USB devices can I connect?
A: You can connect up to two USB devices to the Receiver.
Q: Where do I connect the computer?
A: Connect the computer to the Transmitter USB TO PC port using the included USB-B to USB-A cable.
Q: Where do I connect the USB devices?
A: Connect USB devices to the two USB 2.0 ports on the Receiver.
Q: Can I connect a USB printer?
A: Yes. Printers are listed as supported device examples.
Q: Can I connect a USB drive?
A: Yes. USB drives and pen drives are listed as supported examples.
Q: Can I connect a USB hard disk?
A: Yes. The manual says USB hard disks can be connected for remote access.
Q: Can I connect a keyboard and mouse?
A: Yes, USB 2.0 keyboard and mouse devices should work.
Q: Does it require drivers?
A: No. It is plug and play and does not require driver installation.
Q: Does it support Power over Cable?
A: Yes. It supports Power over Cable, requiring a power adapter at only one end.
Q: What power adapter does it use?
A: It uses a 12V/1A locking power adapter.
Q: Does the package include a power adapter?
A: Yes. The package includes one 12V/1A locking power adapter.
Q: What comes in the package?
A: The package includes one Transmitter, one Receiver, one USB-B to USB-A cable, one 12V/1A locking power adapter, and one user manual.
Q: What does the Transmitter POWER LED mean?
A: The green POWER LED lights when the Transmitter is powered on.
Q: What does the Receiver POWER LED mean?
A: The green POWER LED lights when the Receiver is powered on.
Q: What should I do if my USB drive is not accessible?
A: Check if the CAT cable is connected properly, check the green and yellow indicators on both ends, and check the POWER LEDs on the devices.
Q: What should I do if the USB device is not detected?
A: Check the USB cable from the computer to the Transmitter, check the CAT cable connection, verify the Receiver power LED, and try a different USB device.
Q: What should I do if the connection is unstable?
A: Use a shorter or better-quality CAT cable, use CAT6 if possible, remove couplers or patch panels, and confirm the cable is directly connected between Transmitter and Receiver.
Q: Does the USB-EXB330-K need external power?
A: Yes. Connect the included 12V/1A locking power adapter to one end of the setup. Power over Cable can power the other side.
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