Product features and parameters: 1. Bluetooth version: V4.2+BR+EDR+BLE 2. Transmission distance: 8-10 meters 3. Music playback time: maximum volume is about 5.5h, medium volume is 10h 4.IA charging time: about 5 hours 5. Use QI charging separately: charge the phone with 3000MAH 6.QI charging + speaker playback time: can charge the phone 1500MAH+2h playing time 7. Standby time: 120h 8. Support file format: MP3, WAV, WMA, FLAC, APE 9. Battery material: 18650 10. Battery: 4000MAH 11. Charging voltage: DC 5V/1A-2A 12. Charging socket: micro 5pin (V8) 13. Speaker power: 5W*4 14. Input source type / function: Bluetooth / FM / TF card / U disk / 3.5MM / RCA / fiber / infrared remote control / built-in microphone / alarm clock / clock / hands-free calling / wireless charging 15 product size: 248*102*57mm 16. Bare weight: 625g 17. Box packaging weight: 940g 18. Single box size: 28.5*8.5*14cm 19. Accessories include: 3.5 audio cable, charging cable, fiber optic cable, RCA cable, remote control, manual