Overview SK-04 is the next-generation USB speaker phone manufactured specifically for SkypeTM and QQ with cutting-edge technology. Simply plugging it into the USB port of your PC or laptop, you can make/answer Skype/QQ calls just as you would be on a regular telephone. Features Seamless integration with Skype without the needs of any special drivers or plug-in software Rings loudly on an incoming Skype/QQ call. Fully functional keypad enables you to make/receive Skype/QQcalls even easier. Hook switch allows for intuitive answering/ending Skype/QQ calls Acoustically isolated speaker and microphone to eliminate echo. Full-duplex communication with crystal clear speech USB Interface PnP. No external power/sound card required Built-in headset jack Hands-free microphone and speaker Also compatible with other PC-based softphone applications, such as MSN, Yahoo Message, Xten, Dialpad, MediaRing, Net2phone, etc. Supports Windows, Linux, Mac and Pocket PC. Specification USB B-type Connector One 3.5mm microphone jack and one 3.5mm speaker jack 4V-5.25V DC (USB support) USB Interface v1.1 Dimension: 205 mm x 155 mm x80 mm Weight: 600g Operating Temperature: 0~50 degree Operating Humidity: 5%~95%RH System requirement Pentium MMX 300MHz or Above, with USB Interface, Minimum 128MB RAM or more Broadband or 56Kbps Analog.