Specification Model 3551AProduct Name Color Display Weather StationProduct Size 16 1cm x 3 2cm x 11 5cmScreen Type Touch screenPower Options Battery powered or USB poweredWeight 214gTemperature Range Indoor 0°C to 50°C 32°F to 122°F Outdoor 40°C to 70°C 40°F to 158°F IndoorOutdoor Measurable Range 20 RH 95 RHFeatures 1 3 touch screen setting buttons 2 Calendar up to 2099 years 3 Time in selectable 12 24 hour format 4 Daily alarm function 5 Snooze function 5 minutes 6 Humidity Indoor and outdoor measurable range 20 RH 95 RH 7 Temperature Indoor temperature measurement range 0°C 32°F 50°C 122°F Outdoor temperature measurement range 40°C 40°F 70°C 158°F Temperature can also be in °C or °F 8 3 levels of indoor comfort not displayed when the temperature is above 25°C or below 20°C 9 Recording of maximum minimum values of temperature humidity 10 Wireless outdoor sensor 3 channels switchable Wall mounted or desktop bracket 433 92MHz RF transmission frequency 60m transmission range in open areas 11 Weather forecast function 12 4 levels of backlight brightness 13 The weather station can receive up to 3 wireless sensor channels of which only 1 is included Package Include 1 x Weather Station1 x Outdoor Sensor1 x USB Cable1 x Instruction Manual