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