You can define the button function in Smart Life App With this remote, you can control any ZigBee devices and Wi-Fi devices in your Smart Life App. Mountable and Portable ZigBee Remote Thanks to the magnetic wall plate, the tuya ZigBee remote can be mountable and portable. Works with all the devices in your Smart Life App(Tuya ZigBee Hub is a must) - Please make sure you already have a Tuya ZigBee Hub, it's a must for all the Tuya/Smart Life ZigBee devices.- With this Tuya ZigBee Remote and a Tuya ZigBee Hub, you can control all the smart devices in your Smart Life or Tuya App. (Please be noted the Tuya ZigBee Hub is a must!) Patent Design - Remote Dimensions: 68mm*68mm*10mm, it feels good when you hold it in your hand.- There is a wall plate in the box for every remote, good for use. Specification Colour: WhiteWireless Protocol: Tuya ZigBee 3.0(can just work with Tuya ZigBee Hub, it can't work with other brands' Hub)Control Distance: 10 meters around the Tuya ZigBee HubDimensions: 80mm*80mm*12mmBattery Type: Coin Battery CR2032(included in the box)