Compatible with a variety of remote controls: Compatible with rolling code remote control, learning code remote control, fixed code remote control, (but need to meet 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 working voltage is 12V-24V, that is, 12V 24V is acceptable. WiFi+ remote control function: It can add new remote control methods to your device: 1. APP control (Tuya, Smart Life); 2. Voice control ( Home, ); 3. remote control. Does not affect old control equipment. Means to make your garage door smarter. Color:Grey Material:ABS Package Contents: 1 * Garage wireless remote control switch Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.