Mp3 Alarm Clock YM-A01 * Rings can be personalized. The MP3 music playing can set as the alarm ring. You can also define the music ring on PC and save it on the Bell file of the SD card. It can play a different ring for the alarm time you set each day. * MP3 player with Previous key, Next key, Play key, Vol+ key, Vol- key, Set Key. * Provided with calendar, alarm clock and snooze function, voice time report. *The LCD displays time, day, date, alarm clock icon and temperature. * Speakers are provided with D class amplifier, output power of 1W*2, stereo2.0. *Compatible with SD card write and read. Technical specifications * Three methods of power supply: 4 AAA batteries, USB cable, and AC adapter. * USB 2.0 transfer * MP3 player work current: