Sony XB50BS Extra Bass Sports Bluetooth In-Ear Headphones The Sony MDR-XB50BS earphones combine an elegant sports-friendly design with powerful bass-heavy sound. With the Sony EXTRA BASS technology these earphones deliver a sound that's rich in low-end and perfectly suited to bass-heavy genres like EDM or hip-hop. EXTRA BASS works by accentuating certain low-end frequencies adding a real punch to your favourite tracks and giving you that much-needed energy boost while exercising. The wireless design also means that you can easily listen to music from any device and take hands-free calls via Bluetooth and NFC - no need for tangled cables. With a long-lasting 8.5 hour battery life you don't need to worry about your music stopping abruptly mid-way through your workout. Durable and built to last these earphones have also been designed to be splash proof. So even if it starts to rain outside while you're on your morning run you can continue enjoying your music. Hear the beat feel the power Extra Bass sound gives you more motivation whether you're at the gym or on the street. Enhanced low frequencies make music sound more powerful so you feel energised and driven. Powerful Extra Bass sound gives you the drive to keep going. Listen anywhere do anything Never be without your music again. Bluetooth connectivity lets you run jump kick and more without wires holding you back. Ergonomic arc supporters keep the headphones securely in position while you exercise. Won't let you down Built to be tough and durable the MDR-XB50BS is ready for demanding exercises and workout routines. With splash-proof IPX4 design keeps the music going even when you run in light rain. Built-in microphone for hands-free calls You don't have to pause your workout to take that important phone call. With a built-in microphone and Bluetooth connectivity you can make and answer calls wirelessly from your smartphone. Features Improve your sports performance while listening to your favourite punchy deep bass.