These headphones are part of the EXTRA BASS product line and feature Bass Boost technology. They provide acoustic sealing for optimal sound isolation and rich bass reproduction. The longer battery life offers up to 30 hours of excellent sound for extended listening enjoyment. Bluetooth and NFC one-touch listening also enable wireless connections. The compact and lightweight design of the MDR-XB650BT headphones not only allows for long listening sessions but also enhances the bass. The adjustable headband ensures a secure fit and reduces vibrations that can occur from powerful bass tones. Soft ear cushions provide nearly complete air sealing for direct bass transmission. When not in use, the headphones can be folded and easily stored.