Bluetooth headset 5.0 true wireless black technology $ 12.51 Bluetooth solution: Jerry 6936D Headphone battery: 501012 40mAh Dock rechargeable battery: 602030 400mAh (with protection board) Type: moving coil Resistance: 32 Speaker size: 13mm Earphone playback time: 3-4 hours Bluetooth version: 5.0
