This is a universal 433.92MHz receiver compatible with most remote controls on the market. It can learn fixed and rolling code 433.92MHz remote controls separately or simultaneously. Supports learning and use of most 433.92MHz fixed and rolling code remote controls. 2-channel receiver allows control of two gate automations or alarm systems at the same time. 1. Power supply: 12V24V DC 2. Frequency: 433.92MHz 3. Compatible with fixed, learning, and rolling code systems 4. 2-channel output 5. Operating temperature: -40C to +80C 6. Built-in antenna with reception range of 10100 meters PROGRAMMING: Momentary working mode: 1. Learning transmitter codes: Press "Learn 1" or "Learn 2" for 1 second until the LED lights up. Press the button on the transmitter until the LED flashes and turns off. The code is now stored. Repeat for additional transmitters. 2. Erasing transmitter codes: Press and hold "Learn 1" or "Learn 2" until the LED turns off. All stored codes will be erased. ANT Receiver Antenna CH1 Relay Output 1 CH2 Relay Output 2 V+ Voltage + GND Ground Color: Grey Material: Plastic Package Contents: 1 x Garage Door Receiver (Other items not included) Note: Lighting and display differences may cause slight color variations between the image and actual item. Measurement error allowed: 13 cm.