Remote Optical Sensor 1 to 250 000 RPM Visible Red LED Light Source and Green LED On-target Indicator Max Sensing Distance 3 Ft @ 45 Degrees from Reflective Target Temp Range -10 Degrees to 70 Degrees C 14 Degrees to 158 Degrees F Material Stainless Steel Length (In.) 2.9 in Dia 0.625 in For Use With 1UFL1 to 1UFL3 Includes 8 ft Cable with 1/8 In Phono Plug and 12 in of Reflective Tape Mounting Bracket