Features &©|8226; Hands Free Speaker Phone for PC VOIP and optional Cellular Phone &©|8226; Superior Echo Cancellation &©|8226; Noise Suppression & Far Field Pickup &©|8226; Full Duplex Voice Communication &©|8226; Compliant with USB 2.0 Full Speed Operation &©|8226; Compliant with USB Audio Device Class Specification v1.0 &©|8226; Co***tible with Win 98SE / Win ME / Win 2000 / Win XP and Mac OS9 / OS X &©|8226; Comply with PC VOIP free application software such as Yahoo, MSN and Skype &©|8226; No AC/DC Adapter (Powered by USB) &©|8226; Privacy Mode (Headset Jack) &©|8226; Portable (Small and Light) Specifications &©|8226; Acoustic Echo Cancellation: 45 - 55 dB &©|8226; Noise Suppression: 13 - 18 dB &©|8226; Speaker Volume: 90 - 95 dB (at 30 cm) &©|8226; Voice Pick Up Distance: up to 3 m Hardware Requirements &©|8226; Intel Pentium III 600 MHz CPU or above &©|8226; Windows 98SE / ME / 2000 / XP &©|8226; USB &©|8226; 128 MB |