Material: ABS+MetalBluetooth Version/chipset: V5.1/AC6955FSupported protocols: a2dp\avctp\avdtp\avrcp\hfp\spp\smp\att\gap\gatt\rfcomm\sdp\l2cap profileTransmission Distance: 10MWorking Voltage: 5vImpendance: 32ΩSpeaker Power: 2.5mW Charging Time: 3hCalling and...