The Remote Optical Laser Sensor has a visible red laser light source and green LED on-target indicator.  The class 2 laser source acts as the aiming device during setup and can accurately measure speeds from 1-250,000 RPM from a distance of up to 25 feet with a maximum offset angle of 60 degrees from the rotating object. The sensor is housed in a threaded 303 stainless steel tube and supplied with a 90 degree mounting bracket, jam nuts and an eight foot shielded cable. ROLS-P comes with a 3.5mm (1/8”) male stereo plug adapter. ROLS-W comes with 4 tinned wires.