Description:*Calendar to 2099*Optional 12 / 24 hour format*Automatic*Daily alarm clock function and automatic snooze function*Lunar phase display*With USB output charging function*Air pressure measurement range: 17.72 inHg ~ 3? 6? 7? 6? 72.50 inHg 600 hPa / mb~1100 hPa / mb *The unit of pressure is inHg or HPA / MB *Humidity: indoor and outdoor measurable range: 20% RH ~ 95% RH *Temperature: indoor temperature measurement range: 32 f (0 C) ~ 122 f (50 C)*Outdoor temperature measurement range: - 4 f (- 20 C) ~ 140 f (60 C)*The temperature unit is f or C *Outdoor high and low temperature alarm function*Min / max display of humidity and temperature (can be cleared manually)*Temperature and humidity trend display*Wireless remote control sensor: rf433.92 Hz RF signal transmission - can be placed and hung*Transmission distance: 60m*Barometric pressure: barometric pressure trend display in the past 24 hours*Weather forecast function: 7 weather forecasts in the next 24 hours (sunny, cloudy, cloudy, light rain, rainstorm, light snow, heavy snow)*Backlight: power supply mode: backlight with 4 different brightness and turn off backlight battery power supply: manually touch the product bright screen for 15 seconds*Two power supply modes: battery power supply or power supply can be selected