
CH-U350TX & CH-U331RX
A Flexible and Scalable Digital Audio-Visual Signage System.
Product Introduction
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Four cores, eight functions, creating unlimited possibilities for audiovisual presentations.

Using AV over IP to plan audiovisual presentations, integrating four devices to provide the following eight major functions: screen preview, distance extension, matrix switching, screen stitching, screen splitting, keyboard and mouse control, venue management, and environmental control support. This setup solution offers high scalability, capable of meeting various application scenarios based on different venues and requirements.
4K60 resolution provides detailed high-quality visuals with a smooth and immersive viewing experience.

Supports resolutions up to 4096x2160 @60Hz 4:4:4, delivering finer image quality compared to 1920x1080 @60Hz. This ensures exceptional visual performance for multi-screen video wall displays.
Supports up to 200 meters of long-distance transmission.

By using network cables to connect the encoder (TX) to the network switch, and then to the decoder (RX), a transmission distance of up to 200 meters can be achieved.
Screen stitching: Multi-screen single display

Through the screen stitching feature, you can combine a set of signal images across multiple screens like a puzzle, enlarging the display onto a video wall for a comprehensive big-screen experience.
Keyboard and mouse control: Control computer devices.

It allows transmitting the screens of multiple computers to different locations and remotely controlling them using a keyboard and mouse, without the need to operate directly on the computers, enhancing convenience and flexibility.
Graphical web management for easy maintenance of on-site equipment.

In the same local area network, users can connect to the device's management webpage (WebGUI) using a computer, smartphone, or tablet for configuration, eliminating the need for on-site operations and making maintenance and management more convenient.
PoE power supply makes installation more convenient.

Through PoE (Power over Ethernet) technology, there is no need for a power adapter. When there is no power outlet in the installation environment, simply connect the RJ45 network cable to the network switch, and it will supply power to the device while transmitting the signal simultaneously.
Product Applications

Application Examples

Sports Bars

Medical Surgery Training

Factory Production Line Monitoring Center

Lecture Halls
CH-U350TX Key Specifications
- Transmits video, audio, and control signals via TCP/IP in unicast (point-to-point) or multicast (point-to-multi) mode, with support for 90° rotation.
- The analog line input on the transmitter sends audio directly to the analog line output and inserts it into the HDMI output on the connected receiver.
- The microphone input on the receiver sends audio directly to the analog line output on the transmitter.
- When connected to a Gigabit Ethernet switch that provides PoE (802.3af), both the transmitter and receiver can be powered directly by PoE.
- Supports USB keyboard, mouse, and storage extension, as well as IR and RS-232 bypass.
- Can be controlled via WebGUI, Telnet, and front panel controls.
Interface | |
---|---|
Input Ports | 1×HDMI (Type A) |
1×VGA | |
1×3.5mm stereo audio | |
Output Ports | 1×VGA |
1×3.5mm stereo audio | |
Control I/O | 1×USB(Type-B) |
1×IR extension (3.5mm) | |
1×IR transmit (3.5mm) | |
1×RS232(DB-9-pin) |
Image | ||
---|---|---|
HDMI Specification | HDMI 2.0 (DVI 1.0) | |
HDCP Specification | HDCP2.2 | |
Input Signal Type | 4096x2160p@60 8bit YUV4:2:0 | |
Output Signal Type | 4096x2160p@60 8bit YUV4:2:0 | |
Maximum Input Resolution | HDMI | 4096×2160p@60 |
VGA | 1920×1200p@60RB | |
Maximum Output Resolution | VGA | 1920×1200p@60RB |
LAN (Streaming) | 4096x2160p@60 |
Audio | ||
---|---|---|
Form | HDMI | LPCM (8 channels), Standard Bitstream |
Enclosure | |
---|---|
Chassis material | Metal (Steel) |
Color | Black |
Dimensions | 231.5mm×25mm×120mm |
Weight | 660g |
Power | |
---|---|
Power Supply | DC 5V/2.6A or PoE (802.3af) |
Power Consumption | 7.15W |
CH-U331RX Key Specifications
- Transmits video, audio, and control signals via TCP/IP protocol, supporting Unicast (point-to-point) and Multicast (point-to-multipoint) modes.
- Multi-screen video wall display supports 180° and 270° rotation.
- HDMI output resolution up to 4K@30Hz (RGB, 8-bit). Note: 4K@50/60Hz (YUV 4:2:0) input resolution will automatically be converted to 4K@25/30Hz (RGB) output resolution.
- VGA output resolution up to WUXGA@60Hz (RB).
- HDMI port supports LPCM 2.0/5.1/7.1 and Bitstream digital audio formats. Note: The receiver’s optical fiber port supports LPCM 2.0 and Bitstream digital audio formats.
- The LINE IN analog audio from the transmitter will be output from both the HDMI and LINE OUT on the receiver.
- The microphone analog audio from the receiver will be output from the LINE OUT on the transmitter.
- Power can be supplied via PoE (requires connection to a PoE (IEEE 802.3af) enabled Gigabit network switch).
- Features 3 LAN ports for connecting multiple receivers without the need for a Gigabit network switch.
- Extends USB signals for keyboard, mouse, or flash drive, and supports infrared and RS-232 signal extension.
Interface | |
---|---|
Input Ports | 1×3.5mm stereo audio |
Output Ports | 1×HDMI |
1×VGA | |
1×3.5mm stereo audio | |
1× Optical Digital Audio | |
Bidirectional Ports | 1×GbE LAN(RJ-45) |
Control I/O | 4×USB(Type-A) |
1×IR extension (3.5mm) | |
1×IR transmit (3.5mm) | |
1×RS232(DB-9-pin) |
Image | |
---|---|
HDMI Specification | HDMI 2.0 (DVI 1.0) |
HDCP Specification | HDCP2.2 |
Input Signal Type | 4K@60 YUV 4:2:0 |
Output Signal Type | 4K@30 8bit RGB |
Enclosure | |
---|---|
Chassis material | Metal (Steel) |
Color | Black |
Dimensions | 231.5mm×25mm×120mm |
Weight | 666g |
Power | |
---|---|
Power Supply | DC 5V/4A or PoE (802.3af) |
Power Consumption | 17.68W |
CH-U350TX Product List
- Encoder ×1
- 3.5mm infrared extension cable ×1
- 3.5mm infrared transmitter cable ×1
- Power adapter (DC 5V/2.6A) ×1
- User manual (original) ×1
CH-U331RX Product List
- Decoder ×1
- 3.5mm infrared extension cable ×1
- 3.5mm infrared transmitter cable ×1
- Power adapter (DC 5V/4A) ×1
- User manual (original) ×1
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