It has USB power cable for default radio wave free function, and supports customized DCF/WWVB/MSF automatic radio wave calibration time function with adapter. It has all the basic functions of the weather clock, as well as the perpetual calendar and clock functions, and the time is 12 hours or 24 hours. The European version displays 7 languages in the week: English, German, Italian, French, Spanish, Dutch and Danish. The US version supports 4 time zone selections and daylight saving time function settings. The product has weather forecast function, which can predict the climate change in the next 12 hours. Four weather forecast patterns display: sunny, cloudy, cloudy and light rain Two alarm clocks can be set. At the same time, the snooze function can be set (OFF or 1~30min) Comfort and window opening and closing reminder function Humidity: indoor and outdoor measurement range: 20% RH~95% RH Temperature: Indoor temperature measurement range: - 9.9 C (15 F) to 50 C (122 F) Outdoor temperature measurement range: - 40 C (- 40 F) to 70 C (158 F) Temperature can be switched in C or F Outdoor thermometer alarm 24h record of minimum and maximum air humidity and temperature Outdoor temperature high and low temperature warning and frost warning Atmospheric pressure: Atmospheric pressure measurement range: 600 hPa/mb to 1100 hPa/mb 17.72 inHg to 32.50 inHg Pressure selection unit: hPa/mb or inHg Backlight function: the backlight is always on when the external power supply is connected, and four brightness levels can be selected ------ on ->medium dark ->off; When the battery is powered on, it will light up for 15 seconds each time