Feature:1. BONE CONDUCTION: Open ear headphone utilizes vibration to transmit sound internally through the cheekbones for balanced, clear sound, the best volume and rich bass, making it safer to enjoy your music while still being aware of the sounds around you, and reducing discomfort in the ear canal.2. CLEAR STEREO SOUND: Adopts Bluetooth version 5.3, premium chip, stable and clear sound. Stereo and bi amplifier design, combined with bone conduction micro vibration sound transmission technology, giving you premium surround sound. ENC active noise cancellation, noisy environment can also be a clear call.3. LONG BATTERY LIFE: Bone conduction headphone built in 230mAh lithium battery, a single charge (2 hours), can provide up to 6 hours of continuous music and calls, Type C fast charging, standby time up to 240 hours. You can enjoy your music comfortably anytime.4. STABLE AND COMFORTABLE: This Bluetooth headphone features a memory metal frame with a bend recovery effect to keep it stable during strong exercise. Weighing only 30g/1.0oz, it has silicone pads on both sides. Lightweight and comfortable for long term use.5. ERGONOMIC AND WATERPROOF: The wireless headset is ergonomically designed for surround sound and streamlined drop in design, IPX6 waterproof, sweat and dust resistant. Perfect for outdoor and indoor sports such as running, biking, hiking, working, etc.Specification:Item Type: Bone Conduction HeadphoneMaterial: Ti Alloy, ABS, SiliconeSize: Approx. 130 x 110 x 46mm / 5.1 x 4.3 x 1.8inBluetooth Version: V5.3Protocol: A2DP, AVRCP, HSPSound Channel: StereoCharging Port: Type CInput Voltage: DC 5V 230mACall: -38dBPlayback Time: 6H (70% Volume, Bluetooth Mode)Battery Type: 230mAh Lithium Ion Battery (Built in).Package List:1 x Bone Conduction Headphone1 x Charging Cable1 x User ManualNote:1. Manual measurement, please allow some errors.2. After exercising and sweating, use wet wipes to scrub them clean and put them back in the box. It will keep the headphones clean as new.