SkyNature Mini Wood Led Alarm Clock Red Display Time, Date, Temperature with Multi Alarms and Voice Control (Black) Wood Wooden digital led alarm clock: portable for travel, weather monitoring with temperature(/) Sound Control--Very senstive to your voice for the built-in sound sensor chip.The setting of "on:sd"and "--:sd" means "ON" and "OFF" for Sound Control mode. Desk & Shelf Clocks add a fashion atmosphere to your bedroom,living room,or office Digital calendar clock large displays Date,Time (12h/24h),Temperature(/) and also has multiple alarms. It can be plugged in via USB or powered by 3AAA batteries(not included)