1. Ergonomic Design, Shocking Bass, Stable Bluetooth Csr Performance 2. High-Definition Calls, Long Battery Life, And Flexible Contraction 3. The Generation 40mm Driver Unit Has Been Repeatedly Calibrated To Create A High-Quality Version With Full Bass And Beautiful Treble, Providing You With High Sound Quality That You Can Believe When You Hear It. 4. Ergonomic Design, Comfortable To Wear 5. Built-In 300mah Large-Capacity Battery To Meet Your Music Needs All The Time Description: 1. Bluetooth Pairing Name: P2961 2.Charging Time:Greater than 3h 3. Bluetooth Chip: V5.1 4. Transmission Distance: ≤10m 5. Call Time: 6h 6. Music Playback Time: 10h (70% Volume) 7. Impedance: 32Ω 8. Sensitivity:113+3DB 9. Signal-To-Noise Ratio: ≥85DB 10. Frequency Response Range: 20Hz-20KHZ Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:light green Material:ABS Package Contents: 5 x Wireless Bluetooth Headset (Including Audio Cable) 5 x Charging Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.