•Bluetooth® over-ear headphones. •With Bone Conduction Technology, which generates a vibration captured by the bones of the inner ear. With this technology, the user's ear and eardrums are free, allowing them to perceive both the content being played through the headphones and other ambient sounds. •Bluetooth® 5 connection.3, with hands-free function, micro SD card slot and built-in 250 mAh battery. •Ergonomically designed, they include integrated control buttons, LED charging status light and Type C charging cable.•Bluetooth 5.3 • Operating distance: Up to 10 meters • Frequency: 20Hz-20KHz • Impedance: 50 Ohms • SNR: >85dB • Distortion: Less than 5% • 250mAh Lithium Polymer Battery • Charging voltage: 5V • Operating time: 5-6h • Charging time: 1-2h • Supports HFP/AVRCP/A2DP • Charging cable included: ABS, metal alloy.