4 Channel WIFI & 433Mhz RF Relay Switch: Add Wi-Fi to your garage door fireplace and a 433MHz remote control. They can be paired with RF as a channel, which is practical for children and the elderly. With built-in 433MHz RF receiver, fixed learning of 433MHz HF is supported. Voice Control: WiFi and 433MHz RF Remote Control with eWelink APP, TUYA/Smart Life App, App for iOS and Android, Compatible with /IFTTT//Google Nest. Three working modes: it can be used for DIY garage door opener and other household appliances. Works as a wireless switch in self-locking mode, as an intelligent button in momentary mode, automate your motorised blind with locking mode. Easy WiFi setup: only 2.4G WiFi network connection, does not support mesh WiFi system and 5G WiFi network. DIY a lot of smart projects: intelligent lights, fans, garage door, humidifier, thermostat etc. eWelink/TUYA also offers other functions such as timer setting, share control and schedule. Specification: Working voltage: MICRO USB 5V / DC 7-24V Maximum input current: 10A Standby current: 80mA Maximum power: 3000W/4 gang Radio frequency: 433MHz Working mode: inching/self-locking/interlocking Size Chart: 75x73x17mm/2.95x2.87x0.67inch Package Includes: 1 Piece Wireless Switch Module Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping