... speaker 2.Bluetooth V2.1+EDR 3.Alloy steel Air Bass DOSS bluetooth speakers for mobile phones compatible: iPhone,iPad, table pc, ... notebook etc( include all device with Bluetooth function) 1. Military technology shell,Alloy steel,antiwear 2. Exquisite design ... in 3.7v 500mah lithium battery, 5. SIG certified bluetooth V2.1+EDR 6. Using for meeting,travelling,car kit,children teaching. DOSS ...