Item Type: Weather Clock_x000D_ Material: ABS_x000D_ Product Size: Approx. 16.7 x 12.9 x 2.9cm / 6.57 x 5.08 x 1.14in_x000D_ Indoor and Outdoor Humidity Measurement Range: 20%RH ~ 95%RH_x000D_ Indoor Temperature Measurement Range: -9.9 to 50, that is 15 to 122. _x000D_ Outdoor Temperature Measurement Range: -40 to 70, that is -40 to 158. _x000D_ Temperature Units: or alternative. _x000D_ Alarms: Outdoor thermometer alarm, outdoor temperature high and low temperature alarm as well as frost alarm. _x000D_ Data Recording: Can record the minimum and maximum values of air humidity and temperature in 24 hours. _x000D_ Outdoor Display: Indoor comfort and safety display. _x000D_ Wireless Outdoor Sensor:_x000D_ 1. Can be installed on the wall or placed on the table; _x000D_ 2. 433.92MHz RF transmit frequency; _x000D_ 3. Transmission range of 60 meters in open area; _x000D_ 4. Up to 3 wireless outdoor sensors can be connected, and the product only contains 1 wireless outdoor sensor. _x000D_ Atmospheric Pressure Measurement Range: 600 hPa/mb to 1100 hPa/mb, that is 17.72 inHg to 32.50 inHg. _x000D_ Atmospheric Pressure Unit: hPa/mb or inHg alternative. _x000D_ Pressure Display: Bar graph showing historical trend of atmospheric pressure over 24 hours. _x000D_ Weather Clock Battery: 2 x AA, delivered without battery. _x000D_ Sensor Battery: 2 x AA, delivered without battery. _x000D_ Weight: 487 g / 17.18 oz(approx.) 1The Thermometer: The indoor temp displayed is measured by the main machine, while the outdoor temp displayed is the data received from the outdoor sensor. 2Higher Accuracy: Comes with wide measurement range in sensing the temperature, humidity and atmospheric pressure, the weather forecast is near at hand. 3Premium Monitor: Able to show various weather condition such as sunny, cloudy, light rain, heavy rain, light snow, heavy snow, etc. to help you make plan. 4Other Functions: Moreover, the weather clock has outdoor high and low temperature alarm, 24 hours maximum and minimum value record and other functions. 5Simple in Using: The whole operation is very convenient and the noise is low. Suits perfectly for home, office, classroom, hotel, meeting room and more. 1 x Weather Clock 1 x USB Power Cable 1 x Sensor 1 x User Manual