Digital Family Bluetooth 3.0 A2dp Mini Sound Box Mp3 Player Mobile Speaker Bluetooth version:3.0+EDR(A2DP) Military technology shell,Alloy steel,antiwear material Perfect quality sound with pneumatic pressure cone technology,neodymium iron boron speaker Exquisite design,compact size ,easy cooperating External charger dock can be used as power bank to charge for all types of mobile electronic devices.