awei A780BL B Wiress Bluetooth Headphone 1. Listen wiressly and enjoy the thrill and dom of music. 2. 40mm drive unit, thick b, bright treble in the ear, let you fe the sound of each sound, giving you a more comfortable listening experience. 3. Easy to connect Bluetooth 5.0 technology, no interference, no , sing song, call is not stuck, HD resolution, more enjoyable experience. 4. The 250mAh lithium battery lasts for a , enjoys all-day audio and video entertainment, and plays games. 5. Wiress connection, use Bluetooth for audio transmission, and support wired mode, the mode can be switched at will. 6. foldable structure, multi-directional folding, convenient for your small space to carry and carry. 7. With soft skin-friendly earmuffs to reduce long-wearing discomfort. Parameter: 1. Bluetooth version: Bluetooth V5. 0. 2. Standby time: 300 hours. 3. Talk time: 12 hours. 4. Music time: 13-15 hours. 5. Charging time: 2 hours. 6. Frequency response range: 2.402GHz-2.480GHz. 7. Battery capacity: 250mAh. 8. Communication distance: 10 meters. 9. Support protocols: HSP, HFP, A2DP, AVRCP. 10. Impedance: 32 ohms. 11. Sensitivity: 122dB. 12. Net weight: 270g. Package Contents: Bluetooth headset x 1 Audio cable x 1 Charging cable x 1 Instruction manual x 1 Three s Certificate x 1