You can insert the USB power cable to the computer/lap top to play the clock or use the batteries to play the clock
Time,month,date and temperture are displayed,dour display modes are freely optional,sleep sound control wake-up duntiona and display brightness will be automaticallyreduces by half from 6:00 inthe evening to 7:00 in the morning,which favors enery convervation
The built-in clock has backup power supply,so the clock timing will travel even after the external power supply off,but there kinds of power supply:transformer 6vDC or 4x1.5V AAA batteries( not included )
There are five groups of alarms in which a single alarm can be individually turned on or off and any press key can be pressed in the alarm state to stop the alarm.When the alarm time comes,the alarms will chime for one minute with the alarm sounds of the"Tick-tick-tick"
Four press keys easy to operate:EXIT key, SET key,UP key,and DOWN key
Terperature displays unit degree Celsius/degree Fahrenheitchich can switched.There area12 hours system and a 24-hour system,which can switch between 12 hours and the 24-hours,the 24-hour system is defaulted