Digital Thermometer Hygrometer for iOS/Android Smart Humidity Temperature Sensor with Alarm and Data Storage for Greenhouse Humidors Cellar Office Small, compact size, our smart hygrometer can be used in many locations such as a baby room, greenhouse, humidor, cellar, and more. The humidity monitor has large LCD and clear numbers, you can more easily read the LCD screen from any angle. Features: Wireless App Control: We uses a high-end BT 5.0 chip and can easily monitor temperature and humidity data remotely on app (free downloading from App Store and Play). Up to 5 meters connecting distance (no obstacles) enables you to monitor temp and humidity remotely.  Higher Accurate Monitor: Using an accurate and sensitive temperature and humidity sensor, it can achieve a temperature error of ±1℃(33.8℉), a humidity error of ±5%, and refresh once per second for higher accuracy. Data Storage Export: Support temperature data export function, record a group of data every 10 minutes, can store up to 1 year of data.  Third-party Voice Control: Support enquiring about temp, humidity via Amazon and smart speaker after the sensor is added to BT gateway. Mini & Portable Design: With a compact design, it is easy to be carried when you go outside. The hygrometer is equipped with suspension holes. You can hang it on your back bag when you hiking. Specifications: Material: ABS Battery: DC 3V, CR2477 Wireless Connection: BT 5.0 BLE Temperature Measure Range: -9.9℃~60℃/14.18℉~140℉ Temperature Accuracy: ±1℃ (33.8℉) Humidity Measure Range: 0%RH~99% RH Humidity Accuracy: ±5%RH Item Size: 48 * 48 * 16mm / 1.89 * 1.89 * 0.63in Item Weight: 34g / 1.19oz Package Weight: 55g / 1.94oz Package Size: 12 * 8.3 * 2.2cm / 4.72 * 3.27 * 0.87in Package List: 1 * Smart Hygrometer 1 * User Manual (English)