Bao Core Backlight LED Message Board With Highlighter Digital Alarm Clock With 4 Port USB HUB Calendar USB or Battery Powered The digital alarm clock sold by Bao Core is genuine products, quality and service is guaranteed,buy from Bao Core to get the best quality, service and genuine products,SAY NO TO CHEAP COPPY. Updated version, not only a alarm clock, but also a erasable memo board, even can be used as a USB convertor,USB hub: with 4 ports USB 2.0 hub. Power supply: USB charging port or AAA battery (Batteries not included),never worry about power off and no battery in hand,convenient charging way make it more popular and practical 16 world famouse songs and BiBi sound in progressive tone let you wake up in soft music instead of awake with a start, good mood from the moment of getting up Set time, date, temperature, alarm and birthday reminder, many functions set in one, don't hesitate, buy one home, it worth holding