Power bank with speaker.
Battery capacity:3500-4000 mAh
Battery Type: Grade A Li-polymer battery
Recycling life: ≥500 times
Size:29×29×135mm
Net Weight: 95g/pc
Input: 5V 800mA
Output:  5V 1000mA
Charging Time:5-8 hours;
Colours available: black,white,red,green,blue,pink,blue etc
Working Temperature: -10.C to + 55.C 
Compatibility:Smart Mobile phones, DC, MP3,MP4, tablet PC,GPS,etc