... life.5. Silicone Rubber Keypad. Operating feel good6. Multi-frequency probe matching.7. Special probe connector, easy replacement ... M, M, 4B.3.220mm..Scanning depth: 220mm. Multi-level adjustable.4.256Image grayscale: 256 levels5.128.Image storage: 128 ... color processing, histogram statistics, frame correlation.8.Upgrade depth : Multi-file real-time to upgrade7.Measurement: distance, perimeter, area, ...