Item Type: Weather Clock Material: ABS Size: Weather Clock: Approx. 9.7x15.2x4.5cm/3.8x6x1.8in Sensor: Approx. 5x9.6x2.5cm/2x3.8x1in Weight: Approx. 445g/15.7oz Use: Weather clock Battery: Weather clock, sensor, dry battery, AA x 2 (shipped without battery) Indoor and Outdoor Humidity Measurement Range: 20% to 95% RH Temperature: Indoor Temperature Measurement Range: -9.9 (14.2) to 50 (122) Outdoor Temperature Measurement Range: -40 (-40) to 70 (158) Temperature can be switched to or Outdoor Wireless Sensor: 3 channels can be connected 433.92MHz RF transmission frequency Up to 60 meters transmitting distance in open area 1[3 TRANSMITTERS] This weather clock is equipped with three transmitters, which can simultaneously display three sets of temperature and humidity data on the same screen. 2[OPTIONAL HOUR SYSTEM] The display of this weather clock is is optional in 12 hour and 24 hour system, the permanent calendar is up to 2099. 3[7 LANGUAGES] The weather alarm clock has 7 optional languages: English, German, Italian, French, Spanish, Dutch and Danish. 4[MULTI FUNCTION] Weather forecast clock has two sets of alarm clocks, snooze function, low power reminder, indoor comfort display, indoor mold hazard reminder. 5[BATTERY POWERED] The weather clock thermometer only uses batteries, without power supply, convenient and simple. 1 x Weather Clock (Battery Not Included) 3 x Sensor (Battery Not Included) 1 x User Manual