Sennheiser SP 20 ML (506049) - Sound-Enhanced, User-Friendly Mobile Speaker Phone | For Desk/Mobile Phone & Softphone/PC Connection | Skype for Business Certified Mobile Unified Communications: For professionals using Skype for Business, who require a consistently excellent communication solution Simplify Conferencing: Set up an impromptu conference or share a call with high quality sound - anywhere (Carrying case included) Voice Clarity: Ensure a cleaner sound and a more natural conversation flow with voice clarity and echo canceling features Multimedia & Music Optimized: Expect the highest quality sound, no matter the circumstance, with sound-enhancement profile for music Extended Talk-time: With up to 20 hours of talk time you can always stay focused on your conversations Plug and Play: A 3.5 mm USB cable elimates the need for any pairing, instead allowing for easy plug and play functionality for PCs, cell phones, & tablets Peace of Mind: With a 2-year warranty on the SP 20, you never have to worry about the quality of your speakerphone Omnidirectional Microphone: Enhanced sound detection for small huddle meetings, certified for groups of 6-8 people Take Control: User-friendly functions, including microphone mute button & call and volume controls, help you keep the conference running smoothly Conference Flexibly: Conference across devices without limits  seamlessly merges PC/softphone and mobile calls into one conference