Description: With the wireless protocol of ZigBee, this sensor must be used with ZB gateway. You will get a notification of low-battery level when the battery life gets 10% remaining, which is practical. This sensor adopts adhesives on the bottom for flexible and fast installation on any surface of your home. Integrated with smart voice assistants, you can ask the sensor about the temperature and humidity. You can also simply share the sensor to your family and they can directly check this temperature and humidity on their mobile phones without pairing it. The camera feature is available on the sensor to make you know what’s go on in your home, it reserves time for you to take actions if a fire hazard arises. Using high-quality PC, this sensor is durable to use. The length of this sensor is 4.3cm, the width is 4.3cm, the height is 1.6cm. It is suitable for intelligently controlling the switches of your home appliances. Item Name: Wireless Switch Material:PC Batteries: 1 x 3V CR2450 Button Battery (Not Included) Operating Temperature: -10 Degree Celsius - 40 Degree Celsius Wireless Protocol: ZigBee Size:4.3cmx4.3cmx1.4cm/1.69inx1.69inx0.55in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 X Temperature Humidity Sensor