Inspired by the audio systems used at professional concerts, Sony's unique Line-Shape Diffuser creates line source and distributes the sound evenly, across a wide sound front, to better fill your space with audio. This spreads high-quality sound further and wider around your party, without compromising on sound quality. Unlike the circular diaphragm in a conventional speaker unit, the newly developed X-Balanced Speaker Unit in the XE300 features a non-circular diaphragm which realizes more sound pressure for a high-quality sound.The unit’s non-circular shape not only maximizes the area of speaker diaphragm, increasing sound pressure for more punchy bass, it also reduces driver excursion while maintaining the same sound pressure, resulting in less distortion. The XE300 is waterproof, so you'll have no worries by the sea or the pool side. Additionally, with an IP67 rating, your speaker is sealed against dust, so you can use it on any surface, wherever you take it. Keep the party going with up to 24-hours of battery life on a single charge2, and USB-C quick charging gives you up to 70 minutes of playback after just 10 minutes of charge time. When charging your speaker, the Battery Care feature stops charging just before the battery reaches 100% to increase the health and life span of the battery. With the Party Connect feature, you can combine up to 100 compatible wireless speakers with BLUETOOTH technology and sync your music so everyone dances to the same beat.5 Or with Stereo Pair you can connect two speakers wirelessly for an epic stereo sound. Both features are activated in the Sony | Music Center app.