Relay status setting,According to your living habits and needs, you can set the device to switch on or off after an incoming call or maintain the original switch status so that your home devices can operate normally. Supports two switch types,It can automatically identify rocker switches or self-reset switches and is perfectly suitable for different home switches. Switch status synchronization,The load can be controlled according to the original on/off state of the external switch. After setting the state synchronization, the on/off operation position is fixed and not change due to the on/off operation of the APP. Note: This function is only applicable to rocker switches. Shared control,Share smart control with your family and smart home together. Hign-concerned Chemical:None Communication method:Wi-Fi Product Type:Smart Switch Module Operation Temp:-10-+40 Case Temp:Tc:+80 (Max.) Operation Range:200m Colour:As Shown Material:plastic Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 * Relay Module 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.