Dual Power Supply System. AC power and lithium Battery. LCD display. Compact and lightweight for easy use. 5.0 -7.5 MHz endorectal probe. Extensive vet package. 2 probe connectors for convex probe, linear probe. 6 segment slider TGC and overall gain adjustment. Usb ports available for data transfer Usb flash disk connectable for file share. Extensive software packages including Abdomen, ob, cardiology, peripheral blood vessel, superficial tissue and fetus age table.