Sennheiser HD1 Wireless Headphones with Active Noise Cancellation – Ivory (Discontinued by Manufacturer)

Features

Closed back, around-ear design featuring Bluetooth 4.0 technology and immediate pairing to smart devices using NFC connectivity for wireless freedom. Connectivity Technology: Wireless
NoiseGard hybrid active noise cancellation blocks ambient noise using 4 microphones for ultimate isolation to dramatically improve sound quality in noisy environments
22 hour battery life with both Bluetooth and Noise Gard activated to insure 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 global warranty when purchased from an authorized Sennheiser dealer
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.
Frequency Response - 16 Hz – 22000 Hz , Impedance - passive 28 ohm and active 480 ohm