GEEKERS Digital Alarm, 3" Diameter, Silver DIGITAL CLOCK - A perfect digital clock displays time in 12h / 24h, date and shows indoor humidity and temperate. Wooden alarm clock is a perfect gift for lover and friends. TRIPLE ALARM FUNCTION - 3 groups alarms can to be selected wake you anytime, as well as can be optionally wake you in a few-minute intervals to replace snooze function. Perfect for heavy sleepers. You Have Never Waked Late BRIGHTNESS CONTROL - Are you worried about the brightness in the dark? No problem. The dimmable digital alarm clock comes with 3 levels LED brightness as you need, perfectly easy-to-read and unintrusive. DUAL POWER SUPPLY - This alarm clock powered by USB cable or 4AAA batteries(not include). USB cable is recommended. Pop in four AAA batteries for back up in case of a power outage. During power supply off, alarm and time settings are retained. STYLISH COMPACT DESIGN - With black MDF case (medium density fiberboard) and white led clock digit backlight display, the wooden alarm clock is vogue and it also can be woken by voice(louder than 60dB) or touch.