Features: 1) No device driver required for Win 98 SE, Win ME, Win 2000 and Win XP 2) Ringing for incoming calls 3) High quality, noise canceling microphone 4) Supports Skype, X-Ten, X-Lite, X-Pro, MSN messenger 6.2, Net2Phone, Stan aPhone, SJPhone, and eyeBeam 5) For other VoIP service providers, a software development kit (SDK) available to integrate USB 200A with the services Specifications: 1) Model number: USB 200A 2) Without LCD screen 3) USB port: 2.0 4) USB driver: built-in 5) Sound card: built-in, 16 bit 6) Color: black 7) Weight: 0.15kg (with packaging) 8) Dimensions (L x W x H): 12.8 x 4.5 x 1.9cm 9) Regulatory: CE mark / FCC part 15 class A, B (pending / in process)