Feature: 1. Real Monitor: Accurately measure the temperature and humidity in the room, and quickly transfer the data to your mobile phone, so that you can keep abreast of the indoor environment. 2. Remote Control: Through for ZigBee gateway, temp and humidity can be remotely monitored and controlled by mobile phone, which allows you to operate accordingly when you go out. 3. Long Battery Life: Durable battery power supply, energy saving and environmental protection, stable operation, no need to frequently replace the battery. 4. Easy Installation: The humidity sensor takes a simple pairing setting and requires no complicated operation, making it easy to install and use immediately 5. Wide Use: Suitable for home, office, warehouse and other occasions, to provide you with accurate temperature and humidity monitoring data, bringing a comfortable life. Specification: Item Type: Temperature Humidity SensorMaterial: ABSModel: NAS-TH02BPush Notifications to Your Phone Free for Ios and for Android Apps Battery Type: Alkaline Battery Battery Model: AA Battery Number of Batteries: 2 Temperature Detection Range: -20 ℃ ~ 80 ℃ Humidity Detection Range: 0% ~ 100% Operating Temperature :-20 ℃ ~ 80 ℃ (-4 °f ~ 176 °f) Working Humidity: 0% ~ 100%. Package List: 1 x Temperature Humidity Sensor2 x Screw 2 x Screw Fittings 1 x Instructions