Bluetooth wireless play.
One button Bluetooth reconnection.
Built-in HD Mic, support hands-free function.
Large-capacity lithium battery: 4 times more than similar products of 4400 mA high-capacity lithium battery, support 24 hours a day to play.
4400mAh Emergency Mobile Power: The Suppliers customized batteries, 4400MAH large battery for your phone tablet offers a long battery life. 1 can provide full charge of IPHONE X or Samsung S9 phone. Ten meters inside connection.