Feature: 1. RECHARGEABLE AND REUSABLE: The smart temperature humidity meter support the display of ℉/℃, has a built in battery and can be charged by USB, and can still be used after power failure 2. A VARIETY OF INSTALLATION METHODS: Wall mounted thermometer using bench, wall mounted, magnetic design, easy to install in a variety of places 3. APP CONTROL: Through the mobile phone APP can easily operate the hygrograph, set the upper and lower limits of temperature and humidity, and immediately alarm when the temperature exceeds. You can also view historical temperature, humidity, and brightness data 4. ACCURATE AND PRACTICAL: The accuracy of the temperature humidity sensor is high, the temperature is ±0.3℃, the humidity is ±2%, which is convenient for work and life production 5. EXCELLENT PERFORMANCE: Temperature humidity sensor is made with fine workmanship, possess compact appearance and stable performance, can make sure durability and stability Specification: Item Type: Smart Temperature Humidity Meter Static Current: 30mA Humidity Measurement Range: 0~100%RH Temperature Measurement Range: -19℃~60℃(-2.2℉~140℉) Temperature Measurement Accuracy: ±0.3℃ Humidity Measurement Accuracy: ±2% Brightness Measurement Range: 0~100 Charging Time: ≤2 Hours Battery Life: ≤4 Hours(fully charged) Battery Specification: 1 x 3.7V rechargeable lithium battery 500mAh WiFi Standard: IEEE 802.11b /g/n 2.4GHz(5G not supported). Package List: 1 x Temperature Humidity Meter1 x USB Cable1 x Sensor2 x Screw2 x Wall Plug1 x User Manual