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 operation 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. Specifications: 1. Power supply: 12V-24V 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 10-100 meters Programming Instructions Momentary Working Mode: 1. Learning Transmitter Codes: Press "Learn 1" or "Learn 2" for 1 second until the LED lights up. Press the chosen 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. Terminal Labels: ANT Receiver Antenna CH1 Relay Output 1 CH2 Relay Output 2 V+ Voltage Positive GND Ground Color: Grey Material: Plastic Package Includes: 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 is +/- 1-3 cm.