Dianoo Cube LED Alarm Clock Time Temperature Date Sound Control, Black Wood and White Light Alternately display time and temperature 12/24 hour format selectable (initial mode: 24 hour) Alarm clock with "beep" lasting for 1 minute DC 6V/500MA (4*AAA) power supply; built-in battery (battery not included with the clock) Produced with natural material bringing you a healthy and fashionable low-carbon life, and number display is available at dark night