... clock can be operated by power one CR2032 button cell, it can stil work without the power, but ... display (Countdown the Hours, Minutes,and the Seconds) 2.Cycle display(Temperature, date, time, cycle display, display ... *H): 320*90*56mm/12.6*3.5*2.2inchPower by AC adapter: input 100-240V, output ... can be seen with staying in short distance.2.Electronic internal design, completely mute walking3.The ringtone ...