The Sony SRSXB43 Wireless Bluetooth Speaker blends deep, punchy bass with clear vocals for that signature festival sound. It’s durable and easy to use, too, so you and your friends can focus on enjoying the party. Explore some of the features and technologies that make the SRS-XB43 so special. Enjoy deep, punchy sound wherever you like with your EXTRA BASS speaker. Dual passive radiators work together with the 2-way speaker system to enhance low-end tones, giving bass a boost. The SRS-XB43 has been engineered to deliver an irresistible blend of deep, resonant bass, and clear, natural vocals. Up to 24 hours of battery life4 means the SRS-XB43 can party even longer than you can. Even with the lighting on in EXTRA BASS mode, you can party for up to 14 hours. There’s no fun without party lights. The SRS-XB43 has a tweeter light, a speaker light, and a multi-colour line light that all flash in sync with the beat.