Parameters: 12"color LED screen, friendly interface and fashion desig n. High-capacity video replay and permanent image storage. Humanization keyboard, intelligent fluorescent tackball. 8 segment TGC control, overall GAIN control. 2 USB ports, upgrade and extend printer function. 2 probe sockets,probe automatic Identification. SVGA , PAL video output. External video image recorder, image workstation optional Auto-generated report page standard with one convex probe