Impedance:   4Ω
Support: All Bluetooth device
2.POWER BANK
Capacity:4000mah Li-polymer battery
Input:   DC/5V/800mAh
Output: DC/5V/1000mAh 5V
Charging time: 3 hours
Power Indicator: LED
3.Bluetooth FREE CALL
Bluetooth Version: 3.0+edr
Voice Language:  English
Device Name: YM-A8
Pin Code:  0000
Standby Current: ＜1mA    Working Current:  80 mA
Frequency:  2.4-2.48GHZ   Noise Ratio: ＞90dB    Working Distance:＞10m
4.phone holder
5.connect 2 mobile phones
6. Eight colors