GZLMMY M19 Wireless Headphone

Model: M19 1. Bluetooth version: 5.4 2. Chip type: 5605B 3. Function: Bluetooth, AUX (3.5mm round hole), card insertion (TF), FM 4. Button instructions: (after wearing) ① Press and hold for 3 seconds in the middle: power on/off Double press: Summon Language Assistant ② Dial up: Long press: Increase volume Single press: Next song ③ Pull down: Long press: Reduce volume Single press: Previous song ④ Left dial: single press: pause/play Long press: Reject call Double press: make a phone call ⑤ Turn right: Switch Bluetooth/FM mode 5. Battery type: Polymer lithium battery 6. Battery capacity: 200mA with protective board 7. Charging time: 2 hours 8. Duration of use: Approximately 6-8 hours 9. Standby time: about 120 hours 10. Speaker: 40mm 11. Charging port: Type-C 12. Connection distance: accessible within 10m 13. Input current: 5V1A 14. Maximum rated power: 100mW Minimum rated power: 30mW 15. Speaker sensitivity: 105 ± 3db 16. Sound frequency range: 20-20khz 17. Microphone sensitivity: -58 ± 3db 18. Signal to noise ratio: 88DB 19. Impedance value: 32 Ω 20. Cable length: 1.2m ± 10% 21. ① Product size: 19 * 17 * 8cm (Flat side height of headphones: 4.2cm) ② Folding size: 19 * 18 * 4.5cm ③ Packaging size: 15.4 * 15.3 * 7.4cm 22. Bare weight: 180g Including packaging weight: 275g