Features: 1) 2C OLED graphic display screen 2) Skip-free MP3 / WMA / ADPCM playback 3) Built-in FM radio / voice recorder / A-B 4) Built-in rechargeable lithium battery 5) Supports synchronized lyric display 6) Book reading / picture browsing 7) 10 sorts of EQ 8) Lock button 9) Multi-language support, including Simplified Chinese / Traditional Chinese / English / Japanese / Korea / Russia / Thai 10) Online firmware update Specifications: 2) Interface: high speed USB 3) Download speed: 500kb/s 4) Screen: 2C OLED screen, 128 x 64 dots 5) Battery: build-in 280mA rechargeable lithium battery 6) Charge time: 3 - 4 hours 7) Play time: 6 - 8 hours 8) Signal to noise ratio: 90dB 9) Range of output frequency: 20Hz - 20kHz 10) Output power of earphone: 5mW + 5mW 11) Record sample frequency: 8kHz 12) Compress rate: (MP3) 8 - 320Kbps; (WMA) 5 - 192Kbps 13) Dimensions (L x W x H): 64 x 41 x 8.7mm Character: 1) Uses Sigmatel decode solution 2) Tiny, ultra-light, aluminum alloy case, metal oxidation for twice 3) Conveniently customizes users' logos due to pure metal case Order guide: 1) Shell colors: red / silver / black 2) Packing: cardboard box 3) Minimum quantity of an order: 100pcs 4) Inquiry: need to fill in standard price inquiry form for MP3 player En-Tron