1. Built-in MP3 digital decoder for decoding and playing MP3 files.
2. With control key for selections and volume adjustment, with earphone audio input/output jack.
3. Built-in 170mAh lithium battery, 2 * 2W, 32MM hi-fi speaker, with low distortion power amplifier.
4. Can connect to any audio output equipment, such as mobile phones/MP3/MP4/laptops etc.

Input: 5V
Output: 3.7V*1000MA
Built-in rechargeable
Li-ion Battery
Support SD memory card and USB disc