Features 1.Comfortable to Wear: The open ear bluetooth headphones is lightweight, made of premium titanium alloy material, and will not deform at any bending and stretching. The open earplug design helps you achieve true pain free and harmless. 2.Ergonomic Design: The open ear bluetooth headphones ergonomic surround sound and streamlined sinking design. Whether it is running, dancing or wearing glasses, the sports Bluetooth headset can fit the ear. 3.Dual Mode: Open ear bluetooth headphones has MP3 and Bluetooth dual mode, built in 8G large capacity memory, free to change songs, support volume memory and breakpoint memory, exercise without wearing a mobile phone. 4.Linear Vibration: Bluetooth 5.0 sports wireless earphones adopts a new linear vibration unit design, and small and constant linear vibration can realize clear, powerful and highly analytical sound transmission. 5.Bluetooth 5.0, Long Battery Life: Open ear bluetooth earphones adopts Bluetooth 5.0 version with premium chips to ensure stable and clear sound. Built in advanced rechargeable lithium battery, can work for more than 6 hours, charging time is only 2 hours 6.IPX8 Waterproof: IPX8 professional full sweat waterproof open ear bluetooth earphones, suitable for training, fitness and running. Our headphones are sweat proof, waterproof and dustproof in your indoor or outdoor activities. specificationItem Type: Open Ear Bluetooth Headphones Material: Titanium Alloy, ABS Model: X5 Bluetooth Version: V5.0 Protocol: A2DP, AVRCP, HSP, HFP Channel: Bilateral Stereo Built in Memory: 8G Waterproof Grade: IPX8 Playback Duration: 6H (70 Percent Volume in Bluetooth Mode) Battery Type: 135mAh Lithium Ion Battery (Built in) PackageList 1 xOpenEarBluetoothHeadphones 1 x Charging Cable 1 x Instruction Manual