W-KING BLUETOOTH SPEAKER S20 LARGE

We have tested this product and it is awesome!!! 

Bluetooth 3.0 

Working time:6-10hrs 

IPX7 Waterproof/Splashproof upto 1 m

Charging Time :3-4hrs 

Built in lithium battery 3.7v/2000mah

Speaker output: 5W

Size 136*69*48.4mm