Used for rotational machine inspection and process speed analysis, PT-120 series automatically saves max, min, last recorded values, and up to 96 logged data readings during testing. Backlit LCD screen provides clear viewing in any environment, and selectable units include RPM, meters, and meters per minute in metric models or RPM, ft, and fpm in imperial models. This velocity analysis and measuring device comes with 3 AAA batteries, protective case, contact adapters, and contact wheel.