Novel wooden digital rectangle clock Numeral LED display light and the brightness will adjust automatically Functions: Calendar, clock, alarm, thermometer, sound control Two modes:Default display time (1)Alternately display time and temperature [Time and temperature recycling show] (2)Show time Powered by supply DC 6V USB cable or 4 x 1.5V AAA battery (batteries are not included ) Three press keys easy to operate ( SET, UP and DOWN ) Temperature displays unit degree Celsius / degree Fahrenheit which can switched. There are a 12 hours system and a 24 hours system, which can switch between 12 hours and the 24 hours, the 24 hours system is defaulted Detailed Operation Steps: Operation setting: In the normal timing-travel state, press the SET key 3 seconds to enter the setting item, the setting sequence is: Year - month - day - 12H / 24H - hour - minute - alarm group selection ( A1, A2, A3 )- alarm ON / OFF - alarm hour - alarm minute - temperature ( Deg.C / Deg.F ) In the normal state, press the SET key select the display mode In the normal state, press the UP key to set the weekend alarm ON EA / -- EA means turn on / off the weekend alarm In the normal state, press the DOWN key to set the sound control function ON SD / -- SD means turn on / off the sound control function In the afternoon of 12-hour time system, the PM indicator light in the top left corner will show Powered by: USB Cable, 4 x AAA 1.5V Battery ( not included ) Color: As the picture show Product size (L x W x H) : 6 x 6 x 6 cm / 2.36 x 2.36 x 2.36 inches Package Includes: 1 x LED WoodAlarm Sound Control Clock 1 x USB Cable 1 x User Manual