... 2 Bluetooth verson:2.1+EDR 3 Good sound,bass 4 Built-in li-battery 5 CE ROHS ... Surround sound speakers with compact design Item No.:BT-2Features1 ... more than 5 hours3.Support bluttooth audio4.Good sound,bass5.Audio transmission distance:10m6.Work with iPhone, ... design8.Built-in li-battery,DC2.0 charge port Technical Parameter1 Bluetooth Specification:2.1+EDR2 Bluetooth ...