The DOT-Z1 line of distance measuring instruments are among the best in the industry, featuring the highest-performing GPS and the only DMI in the market to offer a USB interface. Here is a comparison of the DOT-Z1 versus two other similar products:

Jamar RAC Plus III/GPS is registered and owned by JAMAR Technologies, Inc.  Nu-metrics Nitestar NS-60 is registered and owned by Vaisala Corporation.  All information is assumed to be correct as of July 18th, 2011. Microdynamics assumes no liability in the accuracy of this information, and we urge customers to do their own research.