1.New Doss speaker 2.Bluetooth V2.1+EDR 3.Alloy steel Air Bass DOSS bluetooth speakers for mobile phones compatible: iPhone,iPad, table ... ,easy cooperating. 3. Pneumatic pressure cone technology,neodymium iron boron speaker,perfect quality sound. 4. Dual power,built in 3.7v ... +EDR 6. Using for meeting,travelling,car kit,children teaching. DOSS bluetooth speakers for mobile phones