Size 1.3 active area is 30x22.5mm amd Size 2 active area is 36x27mm, while most other size sensors are about 20x30mm. Twain Drive Compact. no need battery. Suitable to the low X-ray dose machine, for the smallest flaw and root apex infection diagnose you need high resolution contrast and high definition image, the real solution is 16-20lp/mm.
eBay