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 Frequency Range2.402GHZ~2.480GHZ ISM ... indicatorApplicable matching productsMeet HFP, HSP, AD2P, AVRCP Bluetooth protocol computer, USB Bluetooth adapter, cell phone, IPAD, MID, etc.Battery3.7V 600mA ...