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| Model Number | D28 |
| Material | ABS+Metal |
| Functions | Music Play， Power Bank |
| Bluetooth Version | 5.0 |
| Bluetooth chip | Action 2819 |
| Type of Battery | Li-Polymer |
| Capacity | 3600mAh |
| Charging Way | TYPE-C |
| Time For Charging | 4H |
| Average Battery Life | 5-8H |
| Speakers | 116*2mm |
| Power | 20W+20W=40W |
| Impedance | 4Ω |
| Frequency Range | 80Hz-12Khz |
| SNR | ≥85dB |
| Sensitivity | 90dB |
| Distortion | 5%~10% |
| Color | black |
| Product Weight | 2.7Kg |
| Product Size | 390*175*137mm |
| Packed Weight | 3.14Kg |
| Packed Size | 425*165*190mm |
| PCS/CTN | 4 |
| Carton Size | 447*344*400mm |
| G.W. | 13.3Kg |
| Certifications | CE ROHS FCC |
| Product Status | OEM available |
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