Features:

1.High-fidelity digital amplifier circuit, restore the real voice.
2.The boost and bass gain technology, sound full and powerful.
3.Central control knob control, a key operation.
4.Built-in 2000mAh high-quality high-capacity lithium-ion battery.
5.Handsfree calls, clear sound quality.
6.It has strong compatibility, which can connect with all bluetooth-anabled devices.