The thermometer adopts Swiss Sensirion high-precision (professional) sensors, equipped with precise structural design and ART algorithms. The response speed is fast and the measurement error is small. The screen is equipped with an ultra-wide viewing angle of 180 and the data on the screen can be seen regardless of the viewing direction. Ultra high contrast, data can be read clearly even under harsh conditions.little light. There are two ways to place it, either on the desk or on the wall. The thermometer has an integrated magnet that can be easily attached or removed using the included integrated iron sheet. This version of the thermometer supports Apple HomeKit and Siri. Check the temperature and humidity of your home anytime, anywhere. After connecting Qingping+APP, it can also automatically record temperature dataand humidity within 30 days. E-ink display with ultra-low power consumption, one button battery (CR2430) can be used for 8-12 months in normal room temperature environment. A battery is included, please buy it yourself for a sparelater. Specification: Product weight: 130 g Product size: 74 x 74 x 14mm Screen size: 55 x 55 mm Temperature range: 0-50 Humidity range: 0-99.9% (non-condensing) Wireless network: Bluetooth 5.0 Battery type: CR2430 button battery (included) PS: Do not use it for a long time in an environment where the humidity exceeds 90%. Scope of delivery: 1 * H version bluetooth thermometer 1 * Wall Sticker 1 * Manual