[Brightness Adjustable ] Only when the power cable is connected can the backlight be turned on continuously, 4 levels brightness adjustable. The battery only use the backlight to light up for 10 seconds. With snooze function ( OFF or 1 ~ 30min). Features: [VA Large Color Screen]Solid Wood Frame Design with VA clear color screen, which displays more informations you need: Time / Calendar / Week / Comfort Index / Air Pressure / Indoor outdoor temperature and humidity / Weather forecast / Change trend display. [Switchable Format]Temperature alternatively in ℉ or ℃. Pressure alternatively in inHg or /mb. Time in 12/24HR format with Dual alarms. [Wireless Outdoor Sensor]433.92MHZ transmitting frequency, 50 meters transmission range in an open area. Up to 3 wireless outdoor sensors can be connected. [Widely Used]Suits various scenario like bedroom, attic, garage, pet case, cellar, refrige etc. Temperature alert can be setted, When the indoor and outdoor temperatures reach the set alarm value issue an alarm.