The lanbailan earphone is equipped with Bluetooth 4.1 + EDR APT-X audio decode technology, offering you perfect stereo sound Fully exercise-proof: Sweat-proof, earpiece design, portable and lightweight wireless headset can be stay in your ears comfortably Strong wireless signal: You can enjoy skip-free music in a 10-meter working distance, built-in rechargeable battery, up to 6 hours of talk/play time Built for your active lifestyle, the earbuds are rated IPX level 4 and can withstand dripping sweat High-fidelity stereo music and clear speech via noise reductionGenaveve Lutes