Touchless handheld point-and-shoot tachometer targets a rotating object and provides instant precision results. Optical no-contact measurements are made by placing a piece of reflective tape on the rotating object. Red LED light locks on the self-adhesive reflective tape (30” supplied) and counts rotations. In two seconds it provides rock solid answers from 10 to 99,999 revolutions per minute (RPM). Five-digit resolution is 0.001, 0.01, 0.1, or 1 depending on the revolutions displayed. Unit is designed to measure centrifuges, pumps, rollers, shafts, gears, motors, and moving surfaces. For accuracy see chart. HOLD button freezes results. Precision quartz crystal insures stable and repeatable results. LCD digits are 1/2-inch-high and may be read from 10 feet. Low battery condition is indicated on the display. Impact resistant ABS housing protects the unit. To assure accuracy an individually serial-numbered Traceable® Certificate is provided from the manufacturer’s ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST (National Institute of Standards and Technology). Supplied with a 9-volt battery (for thousands of readings for over a year). Size is 4-3/4 x 1-3/4 x 1-1/4 inches and weight is 4 ounces. Replacement battery Cat. No. CON1112.