Features1. Open-ear design: The new type of headphones that use bone conduction technology is different from others, using the cheekbone to spread sound waves. Designed to be slim, lightweight and comfortable for all-day, everyday wear.2. Durable and sweatproof: IPX5 rated waterproof, resistant to sweat, dust and moisture, it is the perfect training partner for sports, fitness or running enthusiasts.3. Wireless: This headphone is designed with Bluetooth-compatible V5.2 technology, which provides you with stable and clear sound, you can easily enjoy excellent music.4. Noise reduction and low latency: Sound transmission does not go through the eardrum, which reduces damage to the eardrum. The open-ear headphones allow you to hear what's going on around you, safer for cycling, running and driving than traditional noise-canceling devices.5. Comfortable to wear: You don't need to insert the headphones into the ear canal, even if you listen to music all day, your ears won't feel sore. An excellent choice for music lovers.SpecificationMaterial: Titanium alloyColor: Black, Red, Blue, GreenPackage size: 30 2 2 cmWeight: 15 gModel: BL09Bluetooth-compatible version: 5.2Battery capacity: 180 mAHUsage time: 15 hoursWaterproof: IPX5Transmission distance: about 10 mPackaging: BoxPackage includes:1 bone conduction headphone