The MMX-7 has all features of the MX & MMX gauges with some additional features and advantages. Selectable Large Digits and B-Scan display options. An internal data logger that stores a total of 12,000 readings and waveforms, 64 user custom definable setups, selectable transducer table for improved linearity, thru paint mode with the single press of a button, multiple calibration and material selection options, and selectable low, medium or high gain options. This is all nicely packaged in a very mini portable aluminum extrusion for extra durability and portability! Our java based DakView PC or MAC OSX software makes this thing a complete kit and then some! 2-year limited warranty.