The Extech 461995 is a high-precision dual-mode tachometer combining non-contact laser RPM measurement (up to 6.5 ft away) with traditional contact RPM and linear surface speed testing. Ideal for industrial maintenance, automotive, and HVAC applications, it features a narrow-beam laser for safe, accurate readings on hard-to-reach or hazardous rotating components. Includes Max/Min/Last memory, 5-digit LCD with mode-reversing display, and accessories for both contact and photo modes.