Fangrui Product Details 1. T&g Tg437 20w Portable Tws Subwoofer Bluetooth Speaker 2. Bluetooth Version: V5.3 3. Frequency Response Range: 120hz-20khz 4. Audio Signal-to-noise Ratio: Greater Than Or Equal To 95db 5. Battery Capacity: 3000mah 6. Box Material: Abs 7. Playing Time: About 3h 8. Speaker Specifications: 66mmx2 9. Charging Voltage: 5v2a 10. Charging Time: About 3.5h 11. Adopt Advanced Wireless Audio Decoding Chip, Support Wireless Device Connection 12. The Sound Is Soft, Clear And Dynamic, With Distinct Levels 13. Direct Reading Of Tf Card And U Disk, Support Line In Audio Input 14. No Connection In Wireless Mode, Shut Down In Half An Hour 15. Multiple Flashing Modes Of Colorful Led Lights, The Light Can Flash With The Music Melody And Switch With One Key, The Music Melody Can Not Only Be Heard But Also Seen 16. Support Tws Function, Support Outdoor Eq Audio Mode