Specification: Color: Black Material: Zinc alloy Bluetooth version: 4.2 Battery capacity: 270 mAh Playing time: 30 hours (laboratory test) Charging time: 2 hours Product size: 551180 mm Audio format: MP3, WMA, WAV, OGG, FLAC Video format: ASF ,AVI,AMV,VOB,MPEG,DAT,RM,RMVB,VOD,MPEG-4,WMV,Xvid,FLV,DivX,MOV,MKV MP4 Image Search: JPEG E-Book Format: TXT Screen Size: 1.54 inch Display Type : Color screen Screen resolution: 320*240 Internal memory: 64GB Frequency response: 20Hz -20KHz Signal-to-noise ratio: about 76dB Headphone output: 20mW Headphone jack: 3.5mm USB interface: USB 2.0 Package content: 1 x Bluetooth MP3 -Player 1 x Charging Cable 1 x Wired Earbuds 1 x User Manual