Your own portable music festival. Throw the SRS-XB21 in your bag, grab your friends and start the party wherever you go. With EXTRA BASS, live music sound and party lights its the mini music festival that you can take with you. The compact SRS-XB21 fits easily in your bag, you can even pop it in the bottle-holder of your bike. Theres no fun without party lights, and the SRS-XB21 has just the thing - flashing new line lights that sync to the beat of your favourite tracks. Hear your music in a whole new way with live sound mode. 12 hour battery life so the party never stops. Waterproof & dustproof design (ip67 rated) so you can take your speaker anywhere. 1 speaker. Compatible with iPod, iPhone and iPad. Bluetooth compatible. Frequency 2Hz-2Hz. General information Model number: srsxb21r. Ce7. Size H7.2, W19.3, D6.5cm. Speaker diameter 4.2cm. Mains operated. Power from USB. USB cable included. Batteries required 1 x rechargeable batteries (included). Battery life: 12 hours.