bluetooth headset wireless TWS5.0 headset

Description：
Bluetooth: 5.0.
Transmission distance: 10m.
BT protocol: hfp, a2dp, hsp, avcp.
Frequency range: 20-20000Hz.
Sensitivity: 98dB.
Impedance: 16Ω.
Waterproof: IPX5. (not submersible)
Charging case capacity: 3.7v 450mah.
Headphone battery capacity: 2*3.7v 50mah.
Music playback time: about 4 hours (depending on music volume).
Charging time: about 1.5 hours for earphones, about 2 hours for charging case.
Color: black or white
Headphone size: 25*30*26mm.