Compact and Compatible - S-Mate2's compact size fits in various mounting boxes, including the EU/86 type and 120 type mounting box and fits almost any switch type, like push switch, rocker switch, etc Suitable for Multiple Scenarios - The combination of S-Mate2 and other devices with the gateway function of "-Remote" can meet various home automation needs , such as two way control, no neutral wire solution, etc, making your life more convenient. Communication :Bluetooth-compatible,Other Camera Equipped:No State of Assembly:Ready-to-Go Model Number:S-MATE2 Compatibility:All Compatible Colour:White Material:Plastic Package Contents: 1 * for Extreme Switch Mate 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.