The zPix (MM-640) from Carson is a powerful USB zoom digital microscope that displays the magnified image right on your computer screen. The impressive 35x-165x effective magnification (based on a 21'' monitor) allows you to see details of ordinary objects you never knew existed! Capture an image to keep using the built-in 640 x 480 resolution Digital Camera. You can even capture close-focus video! The MM-640 zoom digital microscope is compatible with the following: All MAC operating systems, Windows 7 (32 bit or 64 bit), Windows 8/8.1, Windows 10 or earlier Windows versions such as Windows XP SP2 and Windows Vista (32 bit or 64 bit). USB 2.0 or 3.0 port is required. No batteries required. Please visit the Carson website to download any software updates for the zPix digital microscope. Please note, the effective magnification is a combination of the optical system and a high powered digital zoom.The zPix 300 (MM-940) from Carson is a powerful zoom USB digital microscope that displays a magnified image right on your computer screen. The impressive 86x-457x effective magnification (based on a 21" monitor) allows you to see details of ordinary objects that you never knew existed! Capture an image to keep with the click of a button. You can even capture close focus video and send it to your friends and family. Use the base attachment to view prepared slides or remove the base and place the microscope on any surface to reveal fine details. The zPix 300 USB digital microscope will provide hours of fascinating and educational entertainment for adults and children alike. The zPix 300 is compatible with both Mac and PC platforms. A USB 2.0 or 3.0 port is required. The zPix 300 also comes included with a specimen base, 3 blank slides, 1 prepared specimen slide, forceps, eyedropper and a USB Cable. Please note, the effective magnification is a combination of the optical system and a high powered digital zoom. Both the zPix and zPix 300 are backed by Carson's one year limited warranty. At Carson, we strive to make sure our customers are 100% satisfied with the quality of our products. We are so confident in our products that we back them with a One Year Limited Warranty! This Carson product is warranted to be free from defects in material and workmanship for a period of one year from date of purchase. Please contact Carson for additional warranty details.