Time calendar display: Jan. 1, 2000, to Dec. 31, 2099; Time format: 12H/24H optional, Temperature display format: or Weekly display in 7 languages: English, German, Italian, French, Spanish, Dutch, and Danish Time dual-ring alarm function can be set to alarm on weekdays and alarms on weekends. The snooze function can be set for 5~60 minutes Screen display: Indoor environment level 3 comfort level display; Level 3 mold risk display in the indoor environment; Temperature & humidity trend display Indoor temperature range: 0~+50 & +14~+122, display resolution: 0.1 & Indoor humidity range: 20%RH~95%RH, display resolution: 1%RH Outdoor temperature range: -20~+70 & -4~+158, display resolution: 0.1 & Outdoor humidity range: 20%RH~95%RH, display resolution: 1%RH 433MHz ASK receiving outdoor transmitter, up to 3 effective RF channels Outdoor temperature upper and lower limit alarm and frost point alarm function Record of max. and min. indoor & outdoor temperature 6 weather forecasts (predict the weather in 12 hours): sunny, cloudy, overcast, rain, heavy rain, and snow 10s backlight lighting function by battery mode, 3-level backlight selection by the USB power Power supply: the clock is powered by 2 x 1.5V AA (no batteries)/USB power; Transmitter is powered by 2 x 1.5V AA (no batteries) Package included: 1 x Weather Clock 1 x USB Power Cord 1 x Sensor 1 x English Manual