YiRong New Wooden Series Modern Mini Rectangle Wood Grain Calendar Thermometer Super Soft Night Light LED Digital Alarm Clock MT1138 (Blackwood-White LED) Seven functions: Alarm function, Snooze function, Power saving function,Brightness down function, Query function, Calendar function, Test function. 4 keys: MODE key, SET key, UP key and DOWN key. Clear and bright display show Date, Temperature, and Time (12/24hrs). Fashionable and portable digital desktop alarm clock for home & office; New Version LED Display Auto Brightness: display auto dim after 22:00, comfortable brightness at night. Dual power supply, when taking off the external power supply, the internal cell still supplies timer working, but no display and alarm. It can also use 4 available AA batteries. Much special discount will be granted for more order quantity.