A001(a) is a multi-functional device with: 1.MP3 player:insert SD/MMC card to the SD/MMC card port to play music. 2.It's a alarm clock:2001-1-1 to 2099-12-31 calendar,12/24 hour format, year,month,date,hour,minute,second and week to show,Ulitralow awaiting the opportune moment power dissipation, tiny safety being smaller than 15 3.Hi-Fi Mini speaker:it have two loudspeaker,have LINE-IN and LINE-OUT function,can use as the MINI speaker. 4.SD/MMC card reader 5.Thermometer 6.supplying electricity's way:it can use 4 section of AAA battery,5V 1000MA charger and USB cable to connect the computer to supplying electricity.