Deep and punchy sound to enhance the everyday As part of Sony's EXTRA BASS range, the WI-XB400 are lightweight but pack a punch. Enhancing low-end frequencies, these headphones deliver exceptional bass, lifting each and every track. Bluetooth wireless technology Listen to your favourite tracks wirelessly with a Bluetooth wireless technology paired with your smartphone or tablet. All day power and quick charging Enjoy up to 15 hours of non-stop music. If your headphones are running low on power, a 10 minute quick charging will give you up to 60 minutes of play time. Wear all day and listen whenever, wherever you want The soft, flexible and lightweight neckband design is shaped for comfortable, all-day wearing. Each earbud has a built-in magnet for tangle-free carrying and storage, keeping you clutter-free when the music stops. Fits easily into your life The WI-XB400 are both lightweight and portable, with a flexible neckband that makes it even easier to slip into your bag when you're on the move. Easy operation with buttons Use the buttons to play, stop, or skip through tracks and adjust the volume. Voice-assistant compatible A simple button press connects you to your smartphone's voice assistant to get directions, play music, and communicate with contacts. Easy hands-free calling Conversation flows freely with easy hands-free calling, thanks to the built-in microphone. No need to even take your phone from your pocket.