Wireless - Bluetooth: Free yourself from wires and give yourself a full 8 hours of non-stop music: Enjoy a whole week without recharging ,- Sweat resistant: Don't let sweat stop you and continue your training (IPX2 rated) ,- Earphone tips provided in 3 sizes ,- Earrings in 3 sizes ,- Bluetooth 4.1 ,- Rechargeable battery: 80 mAh ,- Integrated microphone & remote control