Features:
1.Built-in Batteries: 1800mAh/3.7V
2. Built-in multi-protection
3. For over-charge， over-discharge， over-current， short-circuit and temperature
4. Input: 5V 0.5A，
Output: DC 5.2V 0.5A，
Output power: 5W
5. Cycling Life: over 500 times
6. Up to 51hrs extra music， up to 12hrs extra talk， up to 12hrs extra play， and up to 57hrs extra talk
7. Weight: 73g
8. Color: Red， Black， Purple， Green， White， Orange， Yellow， Blue