Sennheiser Expand 20 ML Wired Conference Speaker PhoneEnjoy instant teamwork anywhere with a plug and play speakerphone that delivers premium audio, flawless design and easy connectivity. Simply connect to your mobile, laptop or tablet and have your meeting where it suits you. Expand your meetings with a scalable, wired speakerphone series that is portable and works wherever you do. Boost the collective performance of your team with high quality audio thats as easy as plug and play. Specification5> Plug