Weather Station Wireless Indoor Outdoor with Sensors Color Display Digital Weather Forecast Temperature Humidity Monitor Alarm Clock Electronic Sunrise Sunset Time Adjustable Backlight for Home Wall Table Time Calendar Display: January 1, 2000 to December 31, 2099 Temperature Detection Range: Indoor: -9.9℃ ～ +50℃ & +14℉ ～ +122℉ Outdoor: -40℃ ～ +70℃  & -40℉ ～ +158℉ Indoor and Outdoor Humidity Detection Range: 20% to 9 Indoor Temperature and Humidity Detection Cycle: 60 seconds 6 Weather Forecasts: Sunny, cloudy, cloudy, light rain, heavy rain, snowy days Record the Maximum and Minimum Temperature and Humidity Values for INDOOR&OUTDOOR on the day. Air atmospheric pressure unit selection: mb/hPa or inHg Backlight Function: When powered by the battery, the backlight lights up for 15 seconds When powered by DC-POWER, the backlight is divided into 5 levels of brightness (high → low 4 levels, off) and can be set to automatic backlight mode RF Transmission Frequency: 433 92MHz Transmission Range: Open Area 60 meter Meteorological Clock Power Supply: Powered by 2 * AAA batteries (excluding batteries) or USB cable Sensor Power Supply: Powered by 2 * AA batteries (battery not included) Meteorological Clock Size: 7.5 * 2.8 * 4cm/3 * 1.1 * 5.5 inches Sensor Size: 5 * 2.5 * 9.5cm/2 * 1 * 3.7inch Meteorological Clock Weight: 306g/0.8oz Sensor Weight: 54g/1.9oz