Item Type: Bone Conduction Headphone Material: ABS BT Version: 4.2 BT Distance: Approx. 10m / 32.8ft Frequency Range: 100HZ-20KHZ Battery Type: Built in 260mAh Lithium Ion Battery Use Time: More Than 8 Hours Package List 1 x Bone Conduction Headphone 1 x Data Cable 1 x Strap 1BONE CONDUCTION DESIGN: Headphone with microphone, using bone conduction technology to transmit sound through the cheekbone. It is safer than earbuds and over ear headphones and also prevents hearing damage. 2SAFE AND COMFORTABLE: Bone conduction headphone is open ear design so you don't have to put the headphone into your ears and you can enjoy your favorite music while being aware of your surroundings. 3MULTI FUNCTIONAL BUTTONS: This bone conduction headset has multi functional buttons and volume buttons that you can easily control on the headset, such as play, pause, adjust volume, and answer calls. 4LONG BATTERY LIFE: The open ear headphone has built in 260mAh high capacity battery that supports greater than 8 hours of continuous music playback or calls on a single full charge. 5MULTI APPLICATION: Once turned on, the sports headset will automatically connect with the last paired device. Lightweight and comfortable to wear, designed for sports enthusiasts to wear while running, cycling, hiking.