... for choice: C3 (R60): 3.5 MHz convex array; L7 (L40): 7.5 MHz linear array;-Gain: 25 levels (0-100db ... : C3 (R60) probe: 23 levels (70-225mm, step=7mm);L7 (L40) probe: 23 levels (35-112mm, step=7mm);-Focus: C3 (R60 ... ) probe: 15 levels (25-150mm, step=5mm); L7 (L40) probe: 15 levels (15-85mm, step=5mm);-Zoom: 3 levels ...