Slowpitch softball is a popular recreation activity for athletes and "athletes" of many ages. While it is meant to be a fun, collegial time, arguments often arise between players and umpires regarding many facets of the game. One common player gripe is inconsistent calling of illegal pitches. In most slowpitch leagues, pitched balls need to reach a maximum arc of between six and 10 (or sometimes 12) feet. Umpires have a challenging time accurately and quickly determining pitch height and could use a device to assist them. The overarching goal of this project is to create a device that determines the maximum height of a pitch and audibly calls "illegal" pitches.