BT 5.0 supports binaural high-definition calls to ensure that every call is clear and smooth | IPX4 waterproof design so not to afraid of rain or sweat | Transmission distance is 10m, headphones capacity is 40mAh and noise reduction version is CVC8.0 | Master-slave mode can be switched at will, bringing a different true wireless headphone experience | Long endurance time, the 1200mAh charging case provides 30 hours battery life | Touch control design, no more pressure on your ears. Easy to control music, volume and call, and activate voice assistant