WIFI & Remote Control by APP：The hygrometer thermometer is connected by WiFi 2.4GHz (5GHz is impossible for now). Review temperature or humidity change by APP at any time, freely set notification time, support ℃/℉, Google Assistant/Alexa voice control, no need to buy HUB. Smart Connection & Free Data：By SMART LIFE APP, the indoor hygrometer thermometer realizes to connect other TUYA devices, like air conditioner or humidifier etc. If the reaches the value set by APP, the humidifier will be opened or closed automatically. You can view historical data for 3 years, even by time of past 7 days. Accuracy & Two Methods for Power：Examined setting: temperature: -10℃-55℃（14°F-131°F）, humidity: 0-99%RH. Equipped with the high precision sensor, the wireless temperature and humidity monitor can capture ±0.5°C/±1°F and ±3％RH. Electric power is supplied by USB or 2*AAA dry batteries.(Accessories do not include dry batteries). Dual Alarm & HD LCD Display：You can set the temperature or temperature limits. humidity, if the limits are exceeded, the WIFI hygrometer thermometer can give alarm sound and send notification to your cellphone. With LCD, you can quickly read the clear value of battery volume, temperature and humidity. Wide Application & Easy to Carry：The thermometer hygrometer is used in baby room, bathroom holiday villa, cigar storage, reptile breeding, wine bar. Compressed design, adhesive and backing are included in accessories, wall installation is available. You can put it in the guitar box, cigar box or other small containers.