Features 1.WATERPROOF AND DURABLE: The headset features a frame that weighs only 29g/1.0oz, flexible and durable, able to stretch and bend without deformation. IPX6 waterproof for running, hiking, biking and even extreme sports. 2.NOISE REDUCTION CALLING: Bluetooth headset features an advanced CNC noise canceling microphone to improve the call experience. Even when you are outdoors or running, you can speak clearly, provides superior sound quality. 3.BLUETOOTH 5.3 TECHNOLOGY: Combined with the latest 5.3 Bluetooth technology, the open ear headphone provides a fast and stable connection, ensuring that the rhythm of your music follows the rhythm of your workout without disconnecting. 4.BONE CONVECTION: Wireless headphone transmits sound through vibration and utilize the latest skin friendly materials. Comfortable to wear for long periods of time, no need to worry about long video conferences and sports. 5.FULLER SOUND: Bone conduction headphone, the sound source travels through the bone to the cochlea, transmitting sound through the air with clearer mid and high frequencies, providing richer, fuller sound. specificationItem Type: Bone Conduction Headphone Material: ABS Built in Battery: Lithium 90mah BT Version: V5.3 Playback Time: 7 Hours Standby Time: 20 Days Charging Time: 1.5 Hours Speaker Impedance: 1615% Sensitivity: -42db3db PackageList1 x BoneConductionHeadphone 1 x Instruction Manual 1 x Charging Cable