UNBEATABLE BASS, NOISE CANCELING Crusher ANC 2 is the headphone with absolutely everything - Personal Sound and hands-free voice control plus a blend of adjustable 4-mic digital active noise canceling and Crusher Bass that&';s so perfect, we had it patented. Experience full sound and amazing bass you can actually feel. Features 50 Hours Battery + Rapid Charge Crusher Adjustable Sensory Bass Adjustable 4-Mic Active Noise Canceling Personal Sound by MimiA(R) Multipoint Pairing Hands-free Voice Control