MH4 Subwoofer para celular sem fio Bluetooth Fone de ouvido esportivo (prata)

1. Bluetooth 5.0, external volume, FM function, shocking bass, hearing protection, built-in microphone, leather ear loops 2. HIFI sound quality, high resolution audio 3. High fit head beam, ergonomic and comfortable to wear 4. Hands-free calling, built-in microphone for wireless calling 5. Bluetooth 5.0 chip, no inductive delay, stable transmission 6. Folding telescopic design, easy to carry 7. Function: battery display, call function, NFC function, support music, multi-point connection 8. With A2DP/AVRCP high-quality stereo audio transmission and remote control protocol 9. Frequency response: 20-20000Hz 10. Battery capacity: 250mah 11. Power supply mode: USB charging / built-in lithium battery 12. Talk/music time: about 8-10 hours 13. Charging time: about 2 hours 14. Standby time: about 120 hours 15. Sensitivity: -42dB 16. Channel: Stereo 17. How to use: head-mounted 18. Transmission range: 10 meters 19. Charging voltage: DC 5V 20. Rated current: 1A 21. Rated power: 5W 22. Driver: 40mm 23. Impedance: 32 ohms 24. Weight: about 160g