Everyone's price performance competitive friend. ODM-2100 presents comprehensive function, durable design, sharp and clear image to fulfill doctor's daily operation. Features Imaging Mode: B, B+A, B+B, A High Resolution Images Memory: up to 8 Images Zoom: 34 ~ 60mm, up to 6 steps adjustable Variable Displaying Area 5 Segments Adjustable TGC Cineloop for 5.6sec Accurate Axial Measurement under B-mode (SMI-5) Manual Correction of Axial Measurement under A-mode (SMI-5) Multi-groups of Calipers for Distance Measurement Various Area Measurement Methods Measuring Mode: Contact and Immersion 8 Groups’ Average with Standard Deviation (S.D.) Save up to 50 Groups of IOL Calculation Results B-Probe Protection: Hibernation after 10 minutes of Continuous Scanning Foldable Keyboard & Portable Design Trackball for Easy Measurement and Operation Real-Time Clock Optional Image Output: Video Printer or Workstation