The "Pro" model is distinguished from the Basic and Standard versions by its integrated 66-channel high-sensitivity GPS receiver, allowing for "sensor-less" operation without tapping into the vehicle's speed sensor (VSS).
against the Standard and Basic models to see which fits your specific surveying needs? Distance Measuring Instruments and Services - FAQ microdynamics dot-z1 pro user manual pdf download
Microdynamics DOT-Z1 Pro is a high-precision, vehicle-mounted Distance Measuring Instrument (DMI) designed for surveying, mapping, and route planning. It is part of a series known for accuracy up to 0.5 feet per mile using advanced 4-digit calibration algorithms. User Manual & Support Downloads The "Pro" model is distinguished from the Basic