Video compression:H.264 Video resolution: 320 x 240, 640 x 480 Audio compression:G.726 Call input: One microphone input Input power: DC 12V/1A Maximum power: Less than 6W System requirement: Microsoft Windows 98/ME/2000/NT/SO/XP/Vista/MacOS Size: 5.1"(L) x 4"(W) x 5”(H)