Sennheiser HD 4.50 BTNC Bluetooth Wireless Headphones - Black Contents: Headphones, Audio Cable, USB Cable, Manual, Soft Case, Box. Used Tested Working Condition. In Good condition. Product Identifiers BrandSennheiserMPN506783ModelHD 4.50 BTNCeBay Product ID (ePID)239084045 Product Key Features Fit DesignHeadbandFeaturesNoise Cancellation, Foldable, Playback Controls, Volume ControlMicrophoneBuilt-InCompatible BrandUniversalWireless TechnologyBluetoothEarpiece DesignEar-Cup (Over the Ear)EarpieceDouble Additional Product Feature