Bone Conduction Technology & High-fidelityAs we all know, sound travels faster in solids than air.adopt the advance bone conduction technology which transmit sound to your auditory center through the skull instead of air.Maintain the fidelity of the sound to the greatest extent.Bone conduction saves many steps of sound wave transmission, can achieve clear sound reproduction in a noisy environment.Advanced Bluetooth 5.2 VersionThe latest bluetooth 5.2 chip bings stronger and faster connection. And it is truly wireless to make yourself free from cable mess.Supporting a variety of Bluetooth-compatible devices, including smart watch, tablet, iOS or Android devices...BD&M bone conduction earphones are designed to be hung behind the ears and have a simple and stylish looks. Let you become a fashionista in one second.No Pain For All Day: The Open-ear design of BD&M bone conduction earphones help you achieve the true painless and harmless.You don't need to put the earphones in the ear canal.So your ears will not feel sore and painful even if you listen to music for whole day.Prevent your ear canal from being hurt by wearing headphones for a long time. Realize true freedom. It is a good choice for music lovers.This open-ear headset can deliver sound through your cheekbones to your cochleas, If you wanna hear audio and also be aware of your surroundings or hear your name called, then these air conduction headphones are for you.It's much safer for running,cycling, hiking or driving while answering calls.48Hour Talk Time - Experience up to 48 hours of talk time and 30 hours of listen time per charge. They also feature a 30-minute Quick Charge for up to 24 hours of talk time.