Polycom C100S Speakerphone for Skype Phone CallsHigh Definition AudioSpeakerphone for Handsfree Skype CallsHands-freeSpeakerphone Conversationswithout echo or feedbackIdeal for small groupconferences or for personal useTwo built-in high quality microphonesConnects and powers through an integrated USB cableNo additional batteries or cables requiredEasy installation, easy to carry with carry case includedAbility to plug in 3.5 mm stereo headphones into headphone jack for private callsDoubles as a high fidelity speaker so you can list to music, web conferences, and presentationsDesktop speakers can be plugged in for additional audio volumeAllows you to launch Skype application and pick up or hang up calls using your mouseBuilt in buttons for call release, volume control and muteLED indicators to display call status such as incoming call, call muted, active call, and message waitingAutomatic Gain Control Technology- adjusts microphone levels based upon the distance the person who is speaking is from the microphonesDynamic Noise Reduction removes background noiseAvailable in Cobalt Blue and Charcoal GraySize: 5.25 x 3.24 x 0.85 inPart Number:2200-44040-001, 2200-44000-001Polycom CX700 Desktop PhonePolycom Communicator C100 Skype-Certified VoIP PC Speakerphonedelivers remarkable audio quality that enables seamless voice and video communications, without compromise. Two high-quality microphones provide excellent range for group conversations with up to four participants.Polycom Communicator C100withPolycom HD Voice technology enables high-fidelity, CD-quality sound,along with unparalleled echo cancellation, noise reduction and full duplex performance.Polycom Communicator C100Sgives you the ultimate hands-free Skype experience. It enables crystal-clear, natural conversations when using Skype. Enjoy the freedom of not wearing your headset for hands-free Skype calls, or plug into the built-in stereo headphone port for private conversations.ThePolycom Communicatordelivers high-fidelity wideband voice quality that sounds like you are in the same room with the people you're calling. Two high-quality microphones provide excellent range for group conversations with up to four participants.Polycom Acoustic Clarity Technologyeliminates echoes and feedback, maximizing your Skype experience.Polycom Communicatorconnects and powers through an integratedUSBcable for easy installation and use – no extra cables to carry or batteries to charge. Its small size and carrying case make it easy to take with you. Plus, the high-quality speaker doubles as a great portable solution forCD-quality musicand presentation audio. Unrivaled ease of use and Skype integration allow you to launch the Skype application and pick up or hang up calls without using your mouse. Convenient buttons and indicators for volume control and mute are also built-in.I often rely on Skype to make cheap calls, in fact I use Skype exclusively in my office – it's a tremendous money saver. But I absolutely hate the fact that when I am ready to make a call my headset seems to have walked away and hidden itself. I've also tried various Skype hand-sets but they all come with their own set of problems which I am not going to get into here.So Polycom sends me theirUSB Communicator C100S speaker phone,but given my past not-so-great experiences with other Skype hardware, I fondled thePolycom C100Swith a certain degree of skepticism. On one hand there is Polycom impeccable reputation for making terrific speaker phones. On the other hand there is the fact thatPolycom C100Sis just another Skypecompatible USBdevice that promises the same technology used in Polycom's legendary line of triangular SoundStation conference phones; crystal-clear, natural conversations, freedom of not wearing a headset for hands-free Skype calls, high-fidelity wideband voice quality, excellent range for small group conversations,Polycom Acoustic Clarity Technologywhich eliminates echoes and feedback, etc. Simple reality is that I, or any other small business, don't care what technology is packed into the gadget as long as Skype conversations are uninterrupted by the party on the other end asking me to reaped what I said because I sound like I'm sitting inside an echo chamber.After using thePolycom C100Sfor a few weeks there is not doubt in my mind thatPolycom C100Sis the best hands-free Skype device there is. The unit itself is about the size of a tradition Cracker Jack box, with volume and mute controls in the middle and fairly large speaker closer to the top. There is another set of speakers at the bottom for voice pickup. A foldout stand on the back ofPolycom C100Splaces the unit in a 40 degree. Included software let me control volume and mute and, according to Polycom, is required to fully take advantage of full audio performance andSkype integration.However, plugging the unit in theUSBport and using Skype interface to make the calls works just fine, which is how I'm am using it now. And if you really need privacy thenS100Scomes with a headphones jack.