The LS-S50ML by Nidec-Shimpo is a color laser sensor which comes in a wide variety of colors. For this specific model, it comes with a class 1 red laser that has a switching frequency of 1.5kHz. For durability, it is protected with a housing that is made of metal with a 6ft cable attached to it. Each of the unit comes with a stroboscopes, counters and panel tachometers. Also, a trimmer potentiometer is included in this model so that sensitivity can be adjusted at a minimum and maximum capacity.