This Green Bluetooth speaker boasts with product parameters of:
- Speaker:    4 5W : 52 mm
 - Bluetooth standard:    5.1 + EDR
 - Transmission distance:    10-25 M
 - Frequency Response:    100Hz-20KHz
 - Size:    81(H) x81 mm (W)x65mm (D)
 - Play time:    3-6 Hours
 - Signal-noise ratio:    75db
 - Distortion degree:    1% 1W 1KHZ