1, high quality MP3 and WMA playback 2, included USB cable connector easily docks to any USB jack 3, blue and red LED indicate the status 4, very easy to operate 5, plastic cabinet with PU coating 6, operate in 3a battery 7, up to 10 HR MP3 play time 8, upgradeable firmware included windows 98 driver 9, operation system: Windows 98(driver required)windows me/XP/2000(no driver required) 10, signal to noise ratio: >90db 11, output:11mw+11mw,32ohm 12, USB 2.0full speed