Description: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 7-24VMaximum input current: 10AStandby current: 80mAMaximum power: 3000W/4 gangRadio frequency: 433MHzWorking mode: inching/self-locking/interlockingSize Chart:75x73x17mm/2.95x2.87x0.67inchPackage Includes:1 Piece Wireless Switch ModuleNote: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