... dimensional image.4.dynamic focus system, dynamic frequency scanning, multi-layer frequency conversion probes with high density.5.use digital ... M, MMain probe: 3.5 MHz electronic convex array (frequency conversion)Electronic focus: 4 focus of random combinationFrame correlation: 4 ... English and Chinese, full-screen character edit etc.Probe frequency conversion: (2-3.5-5.0MHZ) electronic convex array, ...