Edifier D12 Wireless Bluetooth Speaker Car Subwoofer Stereo 1. Bluetooth 5.0, 2.0 acoustics, DSP technology, wireless remote control, wooden box, multiple inputs 2. The wooden textured side panels, leather textured cabinet and black grille decorated with silver decorative strips are integrated into one, calm and flexible, easily integrated into the home 3. Using a two-way frequency division structure of treble and subwoofer, four units form a stereo system 4. The whole wooden box is thick and stable, which can effectively reduce the occurrence of bad resonance 5. Bluetooth 5.0 chip, low power consumption, low latency, long transmission, anti-interference, continuous connection 6. 19mm silk film treble, mellow tone, delicate, stretched and calm listening; 4-inch wool mid-bass, mid-range thick and stable, low-frequency dive powerful 7. Left and right two independent cavities to avoid phase interference between channels 8. DSP all-digital audio processing, high-efficiency drive 4 units 9. The top three knobs can adjust the treble, bass gain, and the overall volume, and switch the composite audio source, which is convenient to control 10. Front two-color audio source indicator, easy to distinguish the audio source mode and working status, use with peace of mind 11. Operation mode: touch 12. Signal-to-noise ratio: greater than or equal to 85 decibels 13. Bluetooth input: 450mFFs 14. Input sensitivity: Line: 700mV, AUX: 550mV 15. Number of speakers: 2 16. Effective distance: 10 meters 17. Interface type: USB 18. Playing time: 8 hours 19. Connection method: Bluetooth connection, 3.5 audio cable connection 20. Speaker adjustment method: knob 21. Battery capacity: 1200mah 22. Power mode: USB charging built-in lithium battery 23. Output power: mid-bass: 20W+20W, treble: 15W+15W 24. Frequency range: 54-20000Hz 25. Waterproof grade: IPX3 26. Dimensions: 35.9 x 15.9 x 20.35cm