Mp3 player
1.This player can work without any external speakers, so it is portable.
2.This player has ternary jack for charging, data exchange & built-in power switch
3.Music format: mp1 / mp2 / mp3 / wma / wav / asf / wmv
4.Port mode: usb 2.0
5.Eq mode: pop / classic / soft / jazz / dbb / rock / normal
6.Playing time: continuously playing time for 350-400 minutes after fully charged
7.Battery voltage: 3.7 v rechargeable li battery
8.Output power : 55mw
9.Headphone output power: 5mw
10.Requency response: 20hz-20khz
11.Battery charge time : about 3 hours
12.Working current: 35-40 ma
13.Info/ noise ratio: 86db
14: color: silver
15: this product 's main body is headphone, and built-in mp3 and li battery.

Pls email to me for more.