【Indoor & Outdoor Monitoring】The digital thermometer hygrometer can display the indoor/outdoor temperature and humidity simultaneously, which is widely applied to baby room, bedroom, home, office, hatchery cellar, basement, warehouse and greenhouse. it's a good helper in daily life 【Strong wireless signal penetration】Attached with Wireless Transmit Sensors，The remote sensors can be put in different places . The station and transmitter signal distance is 30-100M/98-328ft (open area) 【Wide Temp & Humid Range】 Indoor temperature (0 - 60℃，32-140°F); Outdoor temperature (-40 - 60℃，-40°F-140°F); Humidity range (10% - 99%). The temperature and humidity accuracy: ± 1℃ / ± 5%. Wet: humidity﹥65%; COM: 45%≤humidity≤65%; DRY: humidity﹤45%. Data will update every 60s automatically, but the sensor needs about 30mins to be stabilized 【°C / °F switch】Provide two temperature unit choices of ℃/℉，please switch the °C/°F unit first(the default is °C) and then install the battery for the device 【2 mounting Options】It can be stand in the desk or hang on the wall as you like. The station needs 2*AAA Battery (not included); Sensor needs 2*AAA Battery (not included). The battery life is minimum 12 months for base station with one sensor. When the sensor shows the low battery icon that means you need to change the new battery in the sensor Note：Please ensure that you set the temperature unit (℃ or ℉) first, and then insert the battery for use. Once the device is powered on, switching between ℃ and ℉ is not possible during operation