App Support: Free for iOS and for Android mobile Tuya APP/Smart Life APP. Sync Status: Real-time device status provided to App. Remote ON/OFF: Turn 4 electrical devices on/off remotely from anywhere. Remote control: Turn on/off by 433MHz Remote indoors. 3 Working Modes: Switch among interlock/self-locking/inching modes. control: Control each gang separately in Tuya APP/Smart Life APP. Supports remotely turn on or off connected appliances, for example light, electric kettle, electric rice cooker, electric curtain, Garage door opener,Motor,etc. Timing: Supports 8 enabled countdown/single/repeat timing tasks to turn on/off at specified time. DIN Rail Mounted: Great for industrial control. Voice Control: Compatible perfectly with for , for Home, for ,for IFTTT. Share Control: Control your smart home together with your family. (The product printed words depending on the batch, but this does not affect use) Color: As Shown Material: plastic Package Contents: 1 x 4CH Relay Module 1 x Remote Control 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.