Here’s the principle of bone conduction – the sound gets delivered to the inner ear directly, bypassing the eardrum. Here’s why you need to wear bone condition to traditional headphones while doing sports – it is safer. You can see the outer world perfectly while enjoying full submergence in your world of music. Naenka offers open-ear bone conduction running headphones. Battery-powered, they use Bluetooth to communicate with the source of your music. It is a safe and comfortable way to listen to music while running and working out.