The 4500 Weather tracker is the most accurate , comprehensive and reliable hand-held portable weather device on the market. Every single unit supplied is calibrated for every single value, either directly against NIST-traceable standards or against an intermediary standard that is calibrated daily. Every unit is shipped with a FREE Certificate of Conformity that states what calibrations were performed, and the certified performance specifications. For the professional user, They can be absolutely sure that their weather readings are accurate to the stated specifications.

The 4500NV model has the same features as the 4500 but has an olive color body with a night-vision preserving backlight which helps users to sustain natural night vision. The NV's backlight incorporates an optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Additionally, NV backlights are also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations.