Feature:1. Bone Conduction Design: The sound transmits through the bone to auditory nerve, no need to put into ear, no eardrum damage, good for user to advoid ear disease and hearing losing.2. Ear-free Keeping Danger Away: Release your ears to listen the world, you can response to the surrounding situation quickly, far away from dangerous.3. Born for Sports: Sweat-resistant and light-weight design immerse you in sports and music, suitable for walking, hiking, running, climbing, skating, driving and other activities.4. BT 5.0 Connection: Supports BT 5.0 technology, faster transmission speed and higher quality signal. Free to enjoy hands-free calls or BT music via BT connection.5. Long Battery Life: 200mAh rechargeable Lithium battery provides up to 6 hours of playback time on one full charge and the standby time can last to 10 days.Specification:Release your ears, enjoy the listening pleasure in a healthy and safe way with Bone Conduction headphone. Using innovative bone conduction technology, the headphone conducts the speaker through the bone and transmits sound to the bone near the external canal, then to auditory nerve. It avoids the occurrence of ear damage and hearing losing, giving your healthy listening.Features:Bone Conduction Design:The sound transmits through the bone to auditory nerve, no need to put into ear, no eardrum damage, good for user to advoid ear disease and hearing losing.Ear-free Keeping Danger Away:Release your ears to listen the world, you can response to the surrounding situation quickly, far away from dangerous.Born for Sports:Sweat-resistant and light-weight design immerse you in sports and music, suitable for walking, hiking, running, climbing, skating, driving and other activities.BT 5.0 Connection:Supports BT 5.0 technology, faster transmission speed and higher quality signal. Free to enjoy hands-free calls or BT music via BT connection.Long Battery Life:200mAh rechargeable Lithium battery provides up to 6 hours of playback time on one full charge and the standby time can last to 10 days.Specifications:Model Number: E9BT: V5.0BT Profile: A2DP, HFP, HSP, AVCTP, HID, AVDTPOperation range: Up to 10 meters (no obstacle)Frequency Range: 20-20KHzReceiving Sensitivity: 88dBm(±3DB)Mic: -38DB, ±3DB anti-interference microphonesBattery Capacity: 200mAhMusic Playing Time: up to 6 hours (depends on music volume)Standby Time: 10 daysCharging Time: about 1.5-2 hoursColor: Black Main Item Size: Approx. 13.5 * 9.3 * 4.8cm / 5.31 * 3.66 * 1.88inMain Item Weight: 33g / 1.16ozPackage Size: 15 * 11 * 5.5cm / 5.90 * 4.33 * 2.16inPackage Weight: 139g / 4.90ozPackage List: 1 * Bone Conduction Headphone1 * USB Cable1 * Pair of Memory Foam Eartip1 * User Manual (English / Chinese)Package List:1 * Bone Conduction Headphone1 * USB Cable1 * Pair of Memory Foam Eartip1 * User Manual (English / Chinese)