F8 Bluetooth 5.1 Ear-Mounted Stereo Wireless Sports Earphone 1. Bluetooth version: 5.1+EDR 2. Talk time: about 15 hours 3. Singing time: about 15 hours 4. Headphone battery: 75mAh 5. Wireless frequency: 2.4GHz 6. Support protocol: A2DP1.3HFP1.6HSP1.2AVRCP1.6D11.3 7. Transmission distance: about 10 meters 8. Charging voltagecurrent: 5V1A 9. Charging time: about 1 hour 10. Standby time: about 120 hours 11. Speaker impedance: 8mm 32 ohms 12. Microphone sensitivity: -42Db 13. Material: ABS, silicone 14. Charging port: USB 15. Accessories: earphone x1, charging cable x1, manual x1 16. Weight: about 6g Features: 1. The minimalist line design and the collision of the two materials unlock the aesthetics of craftsmanship and balance beauty and comfort 2. According to the shape of the auricle of the human body, disperse the stress points of the ears, so that the ears are evenly stressed and stable and not easy to fall. 3. The front and rear sound chambers are designed with a small elevation angle of 108, which leads to a balanced air pressure inside and outside the ears, and wears without burden. The soft silicone earplugs match the ear canal without squeezing. 4. HD call, intelligent noise reduction 5. 13mm moving coil unit, with large composite diaphragm moving coil, bringing lossless HF sound quality, low and medium frequency diving surging, high frequency bright and transparent 6. Composite diaphragm woofer, full and thick bass 7. Metal diaphragm high-frequency horn, fine and non-piercing treble 8. Tap the button headset to realize music, call, voice assistant and other operations 9. After the first pairing is completed, it will automatically connect after powering on 10. IPX4 waterproof and sweat proof