1.2.1 bluetooth speaker 2.portable wireless speaker design, beautiful and practical. 2.1 bluetooth speaker Product Name Card Reader Bluetooth stereo headphonesProduct ModelK130VersionBluetooth V2.1+EDR ... , blue color indicatorApplicable matching productsMeet HFP, HSP, AD2P, AVRCP Bluetooth protocol computer, USB Bluetooth adapter, cell phone, IPAD, MID, etc.Battery3.7V 600mA ...