K58 True Wireless Semi-in-ear Bluetooth Earphone with Charging Box & Support Intelligent Control(Black)

1. Bluetooth version: 5.02. Bluetooth effective distance: 10M3. Microphone sensitivity: 42DBV/PA4. Battery capacity: 30mAh earphone/300mAh charging box5. Music playing time: 4-5H (one charge) 20H with charging box6. Charging time: 60mini earphones; 90min with charging box7. Semi-in-ear design, convenient and intelligent operation8. Mini and compact, easy to store9. Not only is it comfortable and fits ear ergonomics design, but also greatly shortens the length of the earphone