Temperature Indoor: 0~50C (32~122F) Outdoor: -40~60 (-40~140F) Temperature Resolution: 1C Indoor/Outdoor Humidity: 20~99%RH Channels : CH1, CH2, CH3 (up to 3 sensors) Barometer Scope: 800~1100hpa Outdoor Sensor Frequency: 433Hz Remote sensor : 2 x AA Batteries (batteries not included) Size:15*11*3.5cm Transmitter size: 10.8*3.8*2cm Color:black Package size: 23*12.5*5cm 100% brand new and high quality. Use for indoor and outdoor temperature and humidity. LCD screen display, very easy to read it. Portable and light weight, easy to carry. Measure Indoor / Outdoor Temperature / Humidity and Weather forecast: Sunny, Partly Sunny, Cloudy, Rainy etc. Low battery indicator for outdoor sensor and station Display day of the week, date, and time Made of high quality material, high accuracy and reliable.