Parameters
Battery capacity: 4000mAh
Input power:100-240V~50/60hz
Outut power: 1A-2.6-A USB
Charging time: about 4 houus
Playing time: about 10 hours
Wireless holding time: about 20 hours
Aux in: 3.5mm stereo jack
Bluetooth distance: about 10m
Distortion rate: less than 0.1%
SNR: more than 90dB

Packing list
1 x Bluetooth 3.0 speaker
1 x 3.5mm Audio cable
1 x Micro USB cable
1 x English user manual

Note: If you found some noisey buzzing, please check the audio cable and port or use a new audio cable to test. It is acceptable there are some buzzing when your cellphone or tablet are receiving messages or call.