Battery. Supply two kinds of power supply. (5 batteries to be self-) 

Product Features: 

Multifunction desk clock: a clock， temperature， date， and other functions; 

Bamboo shape and texture to the breath of nature into the room; 

White LED digital display， the switch is turned on， the soft LED light will appear on the smooth surface of bamboo， even at night time can be clearly seen. 

Instructions for use: 

AC / DC adapter， input :100-240VAC， 50/60HZ， Output: 6VDC， output current: 500mA. 

- Insert the adapter DC source clock interface， clock starts. 

Material: MDF skeleton surface oak + 

Size: 210x90x90mm 

  The band: with 220V DC DC power supply， brochures in English 

  Features: automatic switching: 1 minute long time， date， temperature， 12/24 conversion， alarm， voice: DDD ...