Take the party atmosphere wherever you go with this wireless speaker from Sony. With four built-in speakers and two channels, you’ll get impressive sound from a truly portable device. Thanks to the two X-Balanced speaker units, the SRSULT70B delivers powerful sound and ultimate bass. A unique square diaphragm gives you richer, clearer sound no matter what style of music you’re listening to. If you’re in a noisy environment, Sound Field Optimisation ensures audio is clear regardless of what’s going on around you. Choose from two new sound modes using the ULT button – Deep Bass and Attack Bass. And, with a 30-hour battery life, you won’t need to worry about the party coming to a standstill.