mp3 sunglasses(mp888)

1.Polarized lens & TR 90 frame 2.Compatible format: MP3, WMA, ADPCM 3.Available flash memory size: 64MB, 128MB, 256MB, 512MB, 1GB 4.Standard USB port 5.Integrated USB drive 6.Play function: play in order, pause, resume playing etc. 7.Delete function: delete current or all songs or recordings 8.Integrated Microphone supporting ADPCM recording. 9.Continuous playing time: 8 hours 10.Recharging time: 2 hours 11.230mAh/3.7V macromolecule polymer li-ion recharging battery 12.Automatically detected battery voltage and capacity 13.Battery Consumption Saving function: 14.Automatic power off if no button pushed in 2 minutes under pause status 15.Automatic power off in 2 minutes when all tracks played 16.Voice output power: 5mW + 5mW 17.Voice output frequency: 20Hz ~20KHz