Check the listing for details. Sennheiser MB Pro 1 UC ML Headset Mono Bluetooth with Dongle. Color: Black, Condition: Open box. Listed at 69.99 USD. OEMLIQUIDATORSFAST FREE SHIPPING BY UPS or USPS BUSINESS HOURS:Monday - Friday: 8:00AM - 4:00PM Sennheiser MB Pro 1 UC ML (506043) - Single-Sided, Dual-Connectivity, Wireless Bluetooth Headset | For Desk/Mobile Phone & Softphone/PC Connection| w/ HD Sound & Skype for Business Certified (Black) About this itemMobile Unified Communications: For professionals using Skype for Business, who require a consistently excellent hands-free communication solutionDual Connectivity: Switch seamlessly between two connected Bluetooth devices (cell phones, softphones, desk phones, etc.) for premium call flexibilitySeamless PC/Softphone Connection: With the included dongle, connecting to a PC/Softphone has never been easierHD Sound: Powered by a neodymium speaker for legendary Sennheiser HD sound to ensure a clearer and more natural audio experienceUltra-Noise Cancelling Technology: Filters out all unwanted background noise for crystal-clear conversationsExtended Talk-time: With up to 15 hours of talk time, you can always stay focused on your conversationsPeace of Mind: With a 2-year warranty on all headsets (including batteries), you never have to worry about the quality of your bluetooth headsetAll-Day Use: Designed to last an entire working day, featuring extra soft leatherette ear pads and headband padding for maximum wearing comfortSound Enhancement Profiles: Automatically adapts and optimizes sound for both communication and multimedia/music purposesActiveGard Technology: Ensures protection against acoustic injury caused by sudden sound bursts on the line