This is a universal 433.92MHz receiver. It is can work for 99.9% remote control on the market. Can learn Fixed and Rolling code 433,92Mhz remote controls separately and simultaneously!!! Can learn and use most 433,92Mhz Fixed and Rolling code remote controls!!! 2 channel receiver provides you with an option to control and use 2 gate automations or alarm systems simultaneously. 1. Power supply: 12V-24V DC 2. Frequency: 433.92Mhz 433MHz 3. Codes: can work with any fixed/learning/rolling codes 4. 2 channel 5. Working temperature: -40℃- + 80℃ 6. Built in Aerial antenna: Reception range 10-100m PROGRAMMING: Momentary working model: 1.Learning transmitter's codes: "learn 1" or "learn 2" for 1 second, the "learn_led" light, then, the button which you choose on the transmitter till the "learn_led" flash and go out, the transmitter's code has been stored. Repeat the above steps for other transmitters. 2.Erasing transmitter's codes: "learn 1" or "learn2" and hold on to make the "learn_led light till go out, all codes of transmitters which had been stored are 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 Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.