... ,Strong Sound 3.V3.0,Built-in microphone 4.CE/ROHS Jmuisc = Built-in microphone + DSP + Bluetooth CSR V2.1 + A2DP + aluminum ... V3.0, class II ,DSP Technology * Bluetooth Speaker with incorporated microphone * More than 10 meters in working distance (open space) * Bluetooth ... : A2DP1.2/AVRCP1.0 * Built in two loudspeakers* Built in microphone, support phone converstion in the car,at home,at anywhere ...