Sony SRS XB31
Waterproof and dustproof design (IP67 rated) so you can take your speaker anywhere; the speaker can be immersed in water up to 1 m for 30 minutes
Built-in strobe and multi-colour line lighting effects that synchronize to the beat and create a club-like atmosphere; connect up to 100 speakers via bluetooth
24 hours battery life to party day and night
Use your speaker as a power bank: Connect your smartphone via USB to charge the battery
You can connect the SRS-XB31 to the echo DOT via bluetooth for hands free voice control