Main Features:
● Bluetooth V3.0 for wireless audio transmission， work with most phone or device capable of transmitting the Bluetooth stereo protocol
● Support hands free call， pair with your smart phone to use as a wireless speakerphone
● Easy playback control and volume control by pressing and hold volume up and down buttons
● Built-in microphone for answering call
● Built-in 4000mAh lithium polymer battery
● Hanging portable design