Compatible with a variety of RF remote controls: Compatible with rolling code remote control, learning code remote control, fixed code remote control, (but need to meet the following conditions - chip code: PT2262, EV1527, SMC5326, HT6P20, HCS300, HCS301; frequency: 433mhz), this receiver Can store 30+ remote controls. Note: This device is a rare receiver that is compatible with rolling code remote controls (more secure and less likely to be copied). Dry contact receiver: The receiver is a dry contact receiver with passive output, and the working voltage is AC/DC 12V-24V, that is, AC/DC 12V 24V is acceptable. WiFi+RF remote control function: It can add remote control methods to your device: 1. APP control (Tuya, Smart Life); 2. Voice control (Google Home, Alexa); 3. RF remote control. Does not affect the old control equipment. Means to make your garage door smarter. Color:Grey Material:ABS Package Contents: 2 x Garage wireless remote control switch 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.