Color: Blue, White, Sliver, Red, Gray Support: MP3, WMA, WAV music formats and digital music players Used as USB flash driver. to store mp3 songs or data anywhere Flash memory Built-in MP3 Player Capacity: 1GB ~ 4GB available USB2.0 interface Battery: Built-in lithium-polymer rechargable battery play for 5hours(128bps, mp3, EQ normal) Audio channels: Strereo(Left and Right side) Frequencies: 20Hz ~ 20KHz Headphone output: left 15mW + right 15mW is the loudest Signal to noise ratio: 90dB FM Radio: 87.5Mhz ~ 108Mhz Size: 42*30*9.6mm Weight: About 15g