... Function 1.Display Mode: B, B/B, 4B,B/M, M 2.M scanning speed: 1s,2s,3s,4s,5s,6s,7s,8s ... 3. Zoom: *0.8,*1.0,*1.2,*1.5,*1 ... .5/5.0Mhz Convex Array Probe2)3.5/4.5/5.0/5.5Mhz Micro-convex Array Probe 3)5.0/6.5/7.5Mhz Rectal Linear Probe 4)2.5 ... /4.0/5.0Mhz Rectal Convex Probe 5 ...