USAMS US-XD18 TWS In Ear Bluetooth Earphone(Black)

1. Material: PC2. Bluetooth version: 5.33. Speaker diameter: 13mm4. Bluetooth connection distance: about 12m5. Signal-to-noise ratio: 70dB6. Speaker frequency response range: 20HZ-20KHZ7. Headphone battery capacity: 35mAh8. Continuous call time: about 3h9. Continuous play time: about 6 hours10. Headphone charging time: about 1h11. Charging compartment battery capacity: 400mAh12. Charging time of charging case: about 2h13. Charging box input: 5V14. Battery life: about 26 hours15. Firm in-ear type, listen to good sound quietly16. Upgraded Bluetooth 5.3, sensitive fingerprint touch17. Polymer composite diaphragm, stereo sound effect18. High-definition microphone, conversations are as clear as face