Light-Weight and Sweat Proof. As light as 18 grams. Never a burden to the ears. Rubber coating is comfortable to touch and wear, soft and skin friendly. With ergonomical design, ear hooks and rotatable earbuds makes the headsets fit your ear perfectly.Along with their rubber coating, these headsets hardly cause foreign body sensation when wearing. Friction been reduced to minimum on condition that the earbuds can fit in ears firmly when doing sports.
Built-in rechargeable Lithium-poly battery. Can last up to 5 hours while listening to music or talking on the phone. This powerful rechargeable battery has up to 180 hours of standby time.
Bluetooth 4.1 version provides high-fidelity stereo music and clear speech within 10 meter.