40mm neodymium drivers produce rich, crystal-clear audio, while Stereo Haptic Bass provides deep, punchy dual-channel bass for an immersive listening experienceBuilt-in Bluetooth connectivity makes it a breeze to stream music wirelessly from your mobile device so you don't have to worry about cablesSound-isolating technology reduces the effect of external noise so you can focus on enjoying your musicOnboard mic and inline controls allow for hands-free calling and make it easy to control your musicOver-ear design with foam ear pads keeps you comfortable even during extended listening sessionsRechargeable lithium polymer battery provides up to 40 hours of use on a single chargeCollapsible design and included protective travel bag make for easy and convenient portability