Specifications Model TS 6210Product Color White BlackMaterial ABSProduct Weight 267gPackage Weight 380gProduct Dimensions Main unit 12 5 x 2 x 12 5 cmSensor 5 x 3 7 x 10 5 cmPackage Dimensions 18 x 7 x 18 cmPower Supply 3 x AAA batteries or DC 5VFeatures 1 Simultaneously displays three outdoor channels and indoor temperature humidity 2 Three level indoor environment comfort display 3 Temperature detection range Indoor 0℃ to 50℃ Outdoor 50℃ to 70℃ 4 Humidity detection range Indoor and Outdoor 20 to 99 5 Records maximum and minimum temperature humidity for indoor and outdoor 6 Alarm function for exceeding upper lower temperature and humidity limits 7 Temperature and humidity calibration feature for improved accuracy 8 Backlight function and time date display for better usability Package Includes 1 x Main Weather Station3 x Wireless Transmitters1 x User Manual1 x USB Cable