This temperature and humidity tester adopts premium quality sensors to ensure high accuracy of measurement data, with high sensitivity, ultra-low power consumption, one-button refresh, fast response. It can be used as a temperature and humidity data source, and a lot of automation can be done according to the data source. Support custom scene setting, you can preset the alarm value of temperature and humidity in APP, when the test value reaches the alarm value, APP will push the alarm. You need to connect with Bluetooth gateway to realize remote viewing of temperature and humidity. Specifications: Color: White Communication Mode: BT Working Temperature: -10~+55, 0~100%RH Power Supply Mode: AAA battery *3 batteries (not included) Time Display: 12/24 Hour Display Temperature Unit: / Material: ABS Item Size: 8 * 8 * 2.4 cm / 3.15 * 3.15 * 0.94 inch Item Weight: 100g / 3.53oz Package Size: 8.2 * 8.2 * 3 cm / 3.23 * 3.23 * 1.18 inch Package Weight: 120g / 4.23oz Note: You need to connect with Bluetooth gateway to realize remote viewing of temperature and humidity. Data reporting of temperature and humidity is conditional: data reporting rules, temperature change of 0.5, humidity change of 2%, which change, data synchronization to app platform. Package List: 1 * Temperature and Humidity Sensor 1 * User Manual (English)