The C505 is an HDMI signal extender consisting of a transmitter and a receiver, connected via a Cat.5e/Cat.6 UTP cable to transmit HDMI audio-video signals. It supports 4K2K resolution and can extend the transmission distance up to 70 meters.

C505 Cat.5 HDMI Audio-Video Extender (4K2K)
Supports 4K2K Resolution, Transmission Distance up to 70 Meters
What is an "Extender"?
An "extender" is a device used when your audio-video signals/cables need to be extended. Using a signal extender is often the best choice as it is also referred to as an "active extension cable." Extenders generally have built-in signal amplification chips to reduce the degradation caused by extended signal transmission. Common extenders include VGA/D-SUB extenders, HDMI extenders, USB extenders (USB 2.0/3.0), KVM extenders, and more.
Product Introduction
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Product Specifications
- Plug-and-play with no compatibility issues with operating systems.
- Compliant with HDMI 1.4 specifications and HDCP standards.
- Supports audio formats including LPCM 7.1@192KHz, Dolby TrueHD, and DTS-HD MA.
- Equipped with LED indicators for power and signal status.
- Both the transmitter and receiver are powered by adapters, ensuring stable power supply.
- Automatically enters standby mode when no HDMI input signal is detected to save power, while still transmitting IR signals.
- Metal casing provides excellent heat dissipation and includes hooks and screw holes for easy installation; screws are included.
- Suitable for various LCD monitors, LCD TVs, plasma TVs, projectors, and other devices for use in different scenarios.
- Dimensions: 92 x 49 x 25 mm.
Note: The quality and specifications of the network cable affect the transmission bandwidth and distance. It is recommended to use interference-resistant Cat6 FTP/STP cables (shielded twisted pair with aluminum foil shielding) for optimal performance.
Model | C505T | C505R | |
---|---|---|---|
Specification |
Single-Port Transmitter | Single-Port Receiver | |
Video Signal Input Port | HDMI(Female) | N/A | |
Video Signal Output Port | N/A | HDMI(Female) | |
System Connection Port | Input | N/A | RJ-45 |
Output | RJ-45 | N/A | |
IR Connection Port | 3.5mm jack x 1 | 3.5mm jack x 1 | |
Extension Distance (MAX) | [ CAT5e/CAT6 ]-1080p@60Hz:60m、4kx2k@30Hz:35m [ CAT6a/CAT7 ]-1080p@60Hz:70m、4kx2k@30Hz:40m |
||
Supported Resolution (MAX) | 1080p、4kx2k | ||
Power Supply | DC5V 2A | ||
Dimensions (L x W x H) | 92 x 49 x 25 mm |
Product Appearance

1. | IN: HDMI signal input, connectable to HDMI playback devices | |
2. | IR: Connect IR Cable | |
3. | Tx/Rx: IR transmission mode | Set to Tx when connecting an IR Receiver Cable. |
Set to Rx when connecting an IR Emitter Cable. | ||
4. | DC5V: DC 5V 2A power socket | |
5. | ON Indicator: Power indicator, stays solid green when powered on | |
6. | LINK Indicator: Signal indicator Blue light flashes when the network cable connects C505T and C505R. Blue light stays solid when HDMI signal input is detected. |
|
7. | RJ-45 Port: Network cable connection port |

1. | OUT: HDMI signal output, connectable to HDMI display devices such as projectors or monitors. | |
2. | IR: Connect IR Cable | |
3. | Tx/Rx: IR transmission mode | Set to Tx when connecting an IR Receiver Cable. |
Set to Rx when connecting an IR Emitter Cable. | ||
4. | DC5V: DC 5V 2A power socket | |
5. | ON Indicator: Power indicator, stays solid green when powered on | |
6. | LINK Indicator: Signal indicator Blue light flashes when the network cable connects C505T and C505R. Blue light stays solid when HDMI signal input is detected. |
|
7. | RJ-45 Port: Network cable connection port |
Installation Instructions
- Connect the HDMI playback device to the "IN" port of the C505T using an HDMI cable.
- Connect a CAT.5e/6/7 network cable to the RJ-45 ports of both the C505T and C505R.
- Connect the "OUT" port of the C505R to the HDMI display device using an HDMI cable.
- Plug in the power adapters (on both T and R units). When the ON indicator stays solid green and the LINK indicator stays solid blue, HDMI signals can be transmitted.
※To extend IR remote control signals, connect the IR Cable to both C505T and C505R, and set the Tx/Rx mode:
When connecting the IR Receiver Cable, set to Tx to receive remote control signals.
When connecting the IR Emitter Cable, set to Rx to transmit remote control signals to the device.
Network Cable Specifications | Transmission Distance | Maximum Resolution |
---|---|---|
CAT.5e/CAT.6 | 60 meters | 1080p 60Hz 36bits |
CAT.6a/CAT.7 | 70 meters | |
CAT.5e/CAT.6 | 35 meters | 1080p 60Hz 48bits、1080p 60Hz 3D、4K x 2K 30Hz |
CAT.6a/CAT.7 | 40 meters |
Product Application

- DVR monitoring and security systems
- Home appliances/renovation wiring projects
- Elevator LCD advertising screen extension
- Outdoor multimedia LCD digital signage extension
- Classroom/meeting room projector extension
Product List

C505T Transmitter Unit x1

C505R Receiver Unit x1

IR Receiver Cable x1

IR Emitter Cable x1

IR Fixed Adhesive Pads x2

Fixing Screws x4

Power Adapters x2 (5V/2A)

Chinese quick installation guide x1

Product warranty card x1
※The product specifications and accessories mentioned in the user manual are for reference only. Any changes will not be notified in advance. UPMOST reserves the right to modify product design, accessories, and drivers.
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