1.B, B/B, B/M,4B,M four imaging mode 2.3.5 ... and the field of OB/GYN Technical Specifications:Imaging mode: B, B+B, 4B, B+M, MDepth scope (mm): 0~225mmResolution (mm): ... horizontal resolution ≤2(depth≤80), Axial resolution ≤1 (depth≤80), Precision of ... 5%Blind area (mm): ≤3mmZoom: ×0.8, ×1.0, ×1.2, ×1.5, ×1.8, ×2.0, and selective amplification for 2 times ...