Adopting True Wireless Technology, we have removed the cord between left and right earbuds. Yes, truly wireless. TrueBTAir will not fall off because of the ergonomic design of the angled ear tips and ear fins. Its ultra mini size makes it perfect for your fitness routine without bothering you. It comes with a charging case which allows you to charge the earbuds fully 5 times, supporting 30 hours of total music playtime. Smart paring technology automatically powers on and pairs when the earbuds are taken out the case. The dynamic sound for music, sweat proof design for your exercise, and hands free calling features, make it a companion that you will wear all the time.