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