Wiress Bluetooth Earphone Black 1. Bluetooth 5.0, mobile device connection speed is faster, the signal is more stable 2. 9D stereo surround sound, giving you a good music experience 4. Physical key operation, support call 5. Can be used with a single headset or two headsets together 6. Pick up automatic pairing, simple operation 7. Intligent LED digital display + light display, keep abreast of remaining battery status at any time 8. Magnetic charging box, not only can charge the headset, but also charge the mobile phone 9. Adopt P2i nano coating + sealed waterproof structure design, which is enough to deal with the sweat of daily life and sports 10. Ergonomically designed earphones, comfortable to wear and not easy to fall Product parameters: 1. Bluetooth version: T5.0 2. Bluetooth distance: 10m 3. Headphone battery capacity: 45mAh 4. Charging box battery capacity: 1800mAh with protection IC 5. Talk time: 5 hours 6. Music playing time: 4-5 hours 7. Headphone charging time: less than or equal to 1 hour 8. Working voltage: 3.15-4.2V 9. Three-party calling: support 10. Sensitivity: 108+/-3dB 11. Working frequency band: 2.402-2.480GHz 12. Charging box size: 80 x 50 x 27.5mm 13. Single earphone size: 21 x 15 x 13mm 14. Earphone weight: 75g