Sennheiser HD1 Wireless Bluetooth Headphones M2 AEBT Black 507390 Contents: Headphones and all accessories in retail box. New Opened Box Condition. Product Identifiers GTIN0615104285231BRANDSennheiserMPN507390UPC0615104285231eBay Product ID (ePID)709796238 Product Key Features Non-Domestic ProductNoFit DesignHeadbandCalifornia Prop 65 WarningYesColorBlack, ClearFeaturesNoise Cancellation, Adjustable Headband, Foldable, Closed Back, Leather Cushions, Detachable Cable, Microphone, Built-In On/Off Switch, Volume Control, Stereo, Rechargeable