Noise Gard hybrid active noise cancellation blocks ambient noise using 4 microphones for ultimate isolation to dramatically improve sound quality in noisy environments. Connectivity Technology: Wireless | 22 hour battery life with both Bluetooth and Noise Gard activated to ensure performance during long commutes or plane flights | Technology uses 2 built in microphones working seamlessly to improve voice quality and remove external noise during phone calls | 2-year warranty when purchased from an authorized Sennheiser dealer. Very important please note: Detachable cable must be inserted into headphone until it "clicks" and twisted clockwise (to the right) to lock the cable in place | Its especially low profile was optimized for the use on mobile devices. Fitted with jack plugs on both ends, the cable is completely detachable and can be replaced if necessary | Connectivity technology: Bluetooth 4.0, NFC, Wired | Frequency Response 16 Hz to 22000 Hz, Impedance passive 28 ohm and active 480 ohm

The new Sennheiser Momentum Wireless lets you experience crystal clear Momentum sound without being attached to a cable. This high resolution headset sets the benchmark for performance, style and comfort in the wireless headphone category. Bluetooth technology is integrated with engineering expertise to ensure Momentum signature sound remains intact. Near Field Communication (NFC) is provided for effortless “at a touch” Bluetooth pairing with any NFC enabled device. Further enhancing the audio experience is Noise Gard hybrid active noise cancellation that virtually eliminates unwanted ambient sound. Your voice will sound crystal clear during phone calls thanks to Voice Max; dual built in microphones that dynamically cancel out external interference for perfect speech intelligibility. Momentum Wireless features an iconic design using premium materials like stainless steel and real leather. New, slightly larger ear cups using ergonomically designed, memory foam cushions provide extreme comfort for long listening sessions. The stainless steel headband is now foldable for easy and compact storage in the supplied premium carry...