Best sound blu tooth speaker

Wireless version 4.1
.Support A2DP V1.3,AVRCP V1.5 HFP,VI.6,HSP V1.2
.Transducer. 2X 50 MM
.Output power. 2x10W
.Frequency response: 65 Hz-20kHz
.Signal to noise ratio>_80dB
.Battery type Lithium-ionpolymer(3.7V,6000mAh)
.Power supply:5V/2.3A
.USB chargeout:5v/2A (maximum)
. Music playtime:up to 20 hours
varies by volume level and content
.Battery charge time 4.5 hours
.Dimensions (H x W x D) :213x 87 x88.5mm
.Weight 800g