Feature: Wireless subwoofer
Bluetooth version: 5.0
Battery capacity: 1800mah*8, total 14400mAh
Input voltage: 5V/1A
Transmission distance: 10m
Frequency response: 20Hz-20KHz
Signal to noise ratio: ≥90dB
Working voltage: 7.4V
Distortion: 1%
Charging port: Type-C
Power sources D,C battery 
Playing time: 40 hours
Standby time: >90 days
Communication: AUX,bluetooth
Audio Crossover: Full-Range
AUX,bluetooth
PMPO: 75W
Outsource 75W
Active - noise cancellation : passive 
Charging time: 6-10H (different charger adapter has different time