... , and high sensitivity. The image may optionally freeze and double images can display in a composite way on the same screen ... and may optionally freeze one or two images. Except routine surveyingmulti-groups distance, perimeter, area, heart rate, slope ... %,longitudinal≤10%Digital scanning converter: 512×512×8bitsFour kind of pictures percentages: ×1.0, ×1.2, ×1.5, ×2.0Depth promotion ...