About this item 【COMFORTABLE VS SAFE】: Works by Bone and air Conduction without Plugging your ears. the headset's only 0.035lb,Open-Ear design helps you wearing comfortable and stay alert to your surroundings, avoid danger mean while enjoy music,,effectively solve the traditional earphone damage hearing, ear swelling and other problems. 【QUALITY SOUND】: Original Patented Acoustic Technology , Built-in double DSP sound enhancement, external professional bass guidance, deep bass, clear voice, the maximum volume is more than 2 times higher than similar products, noisy environment can also be used.rich bass to provide you with a quality music enjoy. 【Bluetooth /MP3 Dual Modes】. This air and bone conduction headphones built in 16GB Memory , included MP3 player. This will allow you to listen to your favorite music directly from the headsets, no phone required. The Bluetooth 5.1 technology provides faster and more stable connection, zero delay for games and videos. Lower power consumption, compatible with IOS, Android and more Bluetooth devices. Built-in noise reduction MIC, support HD call. 【 PLAYBACK TIME】: Built-in 150MA High quality Li-polymer battery, stronger battery endurance Supports standby time up to 20 days, music play up to 6 hours,up to more than 500 battery cycle life. 【 APPLICABLE MULTIPLE SCENARIOS 】： IPX5 waterproof and sweat proof. The aifmy open-ear earphones Suitable for running,sports ,fitness ,cycling and driving . Listening while supporting barrier-free communication.This bluetooth headset is also suitable for wearing glasses and headphones at the same time.We provide 30 days free replacement and 12 months warranty service Contact us if you meet any issues.