【Package Includes】1 x Runner4 Bone Conduction Headphones + 1 x 4.33 * 2.55" Hard Case

【Comfort & Safety Design】NANK open ear bone conduction headphones feature a premium titanium frame and skin-friendly silicone back bridge that makes it easy to wear all day long. Bone conduction Mode is kinder to the ear canal, it also allows you to monitor ambient sound for a safer workout. This open headphone is a great Partner for runners, cyclists, sports and fitness enthusiasts

【MP3 Mode & Bluetooth 5.4】Bluetooth bone conduction headphones with 16GB of space can store 2000 songs, even without carrying a phone, sports fan can effortlessly enjoy music during workouts. Wireless bone conduction headphones with the latest Bluetooth 5.4 technology, more stable connection and lower latency in data transmission

【IP68 Waterproof Rating】The open-ear bone sport headphones adopts nano-waterproof coating technology and ultrasonic welding design, which can effectively prevent sweat and rain from penetrating. MP3 mode allows you to enjoy music while swimming（Bluetooth mode is not good for swimming!）

【Up to 8 Hours Playtime】Crafted for long workouts, our running headphones provide 8 hours of play on a 1.6-hour charge. A 10-minute quick-charge provides 2 hours of immediate use. Stay connected and energized with durable design