a gift items USB digital microscope,Image sensor: 1.3 Mega Pixels (interpolated ... ), 1024x960, 1024x768, 800x600, 640x480, 352x288, 320x240, 160x120Focus Range: Manual focus from 10mm to 500mmFrame Rate: Max 30f/s under 600 Lus ... by control wheel)PC interface: USB2.0Power source: 5V DC from USB portOperation system: Windows2000 SP4/XP/Vista/Win7, Mac OS ...