Digital wireless thermohygrometer with 3 remote sensor of 98ft/ 30m effective sensing range, very accurate and can be widely used indoor or outdoor. Features multiple data display, backlight and alarm function, calibration function, and so on. A perfect choice of temperature and humidity monitoring for baby room, bedroom, study room, office, greenhouse, wine cellar, warehouse, etc. Features: Wide ApplicationSuitable for indoor and outdoor, for bedroom, baby room, office, greenhouse, wine cellar, warehouse, etc. Totally wireless, tabletop and wall-mounted design. 3 Remote SensorsRemote sensor for indoor and outdoor use, not waterproof, 98ft/ 30m effective distance, long range measuring. One main unit can pair up to 3 outdoor remote sensors. Multiple Data DisplayDisplays time, calendar, week, indoor and outdoor humidity, temperature, temperature and humidity trend, comfort level, and record maximum and minimum temperature/ humidity. Calibration FunctionFeatures calibration function of temperature and humidity to account for any drift that may be present in the system. Backlight & Alarm FunctionBacklight off, backlight on (white), upper limit alarm (orange backlight), lower limit alarm (red backlight). Clear display in the dark, about 8 seconds auto off to save energy. 12H/ 24H & / Switchable12 or 24 hours time format switchable. Change the temperature display to or . Check/ Clear RecordsYou can check the maximum or minimum temperature/ humidity in the past. And you can view or clear records. Battery OperatedNeed USB cable or 3 * AAA battery to power the main unit and 2 * AAA battery to power the sensor. (Batteries not included) Note: The remote sensor is not waterproof, please protect it from rain, snow, etc. Specifications: Color: White/ Black (Optional) Material: Plastic Application: for Indoor and Outdoor Use Indoor Temperature Range: 0~50 (32~122) Outdoor Temperature Range: -50~70 (-58~158) Humidity Range: 20%-99%RH Temperature Display Unit: / Selectable Temperature Resolution: 0.1/ 0.1 Humidity Resolution: 1% Comfort Level: Dry (RH50%), Comfortable (15.6-26.7, RH 50%-70%), Wet (RH70%) Week Display: 8 Languages (English, Russian, Danish, Spanish, Dutch, French, Italian, German) Backlight: about 8 seconds auto off (Power-Saving Mode) Wireless Range: about 100m/ 328ft (Open Distance), 30m/ 98ft (Effective Distance) Power Supply: Main Unit: DC 5V USB Cable (Included) or 3 * AAA Battery (Not included); Sensor: 2 * AAA Battery (Not included) Thermohygrometer Size: 12.5 * 12.5 * 2cm / 4.9 * 4.9 * 0.8in Sensor Size: 10.5 * 3.5 * 3.7cm / 4.1 * 1.4 * 1.5in Package Size: 18 * 18 * 7cm / 7.1 * 7.1 * 2.8in Package Weight: 380g / 13.4oz Package List: 1 * Thermohygrometer 3 * Remote Sensor with Base 1 * USB Cable 1 * User Manual (English, German)