Specifications: Time calendar display: January 1, 2000 to December 31, 2099. Time system 12HR/24HR display selection 7-language week display: English German Italian French Spanish Dutch Danish Time double alarm function (you can set the alarm on weekdays and weekends). 5-60 minute snooze function can be set Indoor temperature display range: 0 ~+50 &+14 ~+122 , display resolution: 0.1 & . Indoor humidity display range: 20% RH 95% RH, display resolution: 1% RH .Outdoor temperature display range: - 20 ~+70 &- 4 ~+158 , display resolution: 0.1 &Outdoor humidity display range: 20% RH 95% RH, display resolution: 1% RH Temperature display format selection (/) Level 3 comfort display of indoor environment Level 3 mold risk display in indoor environment 433MHz ASK receives OUTDOOR transmitter, and can receive up to 3 RF effective channels Outdoor temperature upper and lower limit alarm and frost point alarm functions Temperature&humidity trend display Record of maximum and minimum indoor and outdoor temperatures Level 6 weather forecast (forecast 12 hours later): sunny, cloudy, cloudy, rainy, rainstorm, snow 10 second backlight function - battery mode Level 3 backlight selection - USB power supply mode Power supply: host: 2 1.5V "AA" (shipped without battery)Emitter: 2 1.5V "AA" (shipped without battery)Packing list:1 * Weather clock,1 * USB power cord,1 * Sensor,1 * Five language manualNote:1. Please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting.2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.