Feature:1. Color Digital Display: Wireless thermometer hygrometer is a color digital display for clearer and more convenient viewing.2. Multi Functional: Digital hygrometer supports weather forecast, indoor and outdoor temperature and humidity, time, calendar, temperature trend and other key functions.3. Mirror: Temperature humidity monitor forecasts weather more accurately, the front side is made of mirror material, which can replace mirror.4. ABS Material: Thermometer hygrometer is made of premium ABS material, which is hard, non flammable and impact resistant.5. Stable: Temperature humidity gauge is curved back bracket, can be placed on the table firmly, not easy to fall down.Specification:Item Type: Wireless Thermometer Hygrometer Material: ABSGross Weight: Approx. 468g 1.03lbExternal Sensor: 2 x AA Batteries (Shipped Without Batteries)Host: 3 x AAA BatteriesMainframe Size: Approx. 14.5x13.2cm 5.7x5.2in Weather Station: 0C to +50CIndoor Humidity: 20% to 90%RH (Relative Humidity)Channel: Up to 3 External SensorsExternal Sensors: 30C to +60CReceiving Radio Control Signal: 77.5 KHzTransmission: 30m 32.8yd, RF 433MHz, 10mWPlug: US 120V .Package List:1 x Wireless Thermometer Hygrometer1 x External Sensor1 x Instruction Manual1 x PlugNote:Manual measurement, please allow slight error.