Runner4 Bone Conduction Headphones — IP68 Waterproof, Bluetooth 5.4, 16GB MP3, Open-Ear Wireless for Running, Cycling & Underwater Swimming

Runner4 open-ear bone conduction headphones deliver music and safety for active users. The bone conduction design transmits audio through the cheekbones so your ears remain open to ambient sound—perfect for running and cycling. Wireless Bluetooth 5.4 ensures a stable connection, while the built-in 16GB MP3 player lets you play tracks without a phone. With an IP68 waterproof rating this sport headphone is suitable for underwater swimming and other wet conditions. Lightweight and sport-focused, the Runner4 combines open-ear comfort, reliable Bluetooth 5.4 wireless performance, a 16GB offline music option, and full IP68 waterproof protection for training outdoors and in the water.