The Triplett 2000 Series Railroad Testers are designed to perform standard maintenance tasks (using Volts, Ohms, and Amps measurements) as well as specialized tasks requiring measurements on railroad coding equipment. Model 2001 includes all of the features of the Model 2000 with the addition of Cab Filters. Designed for passenger railroads using both 100Hz and 250Hz coding systems. Includes: test leads, padded water repellent carrying case, shoulder strap, and batteries.