1. Bluetooth version: V4.2 2. Output power: 2*5W 3. Frequency response: 75Hz-20 KHz 4. Blue tooth distance: 10 meters 5. SNR > 65dB 6. Power input: DC 5V 7. Battery built-in: 4400mAh 8. Unit weight: 510g 9. Product size: 137*125*79mm 10. Color: black, white.