AZ-Instrument - Model 8008 -Combo Tachometer

Lowest cost contact and non-contact 2 in 1tachometer in the market, Non-contact measurement by red led beam, Contact rotating object with convex or concave contact tips, Auto power off in 20mins inactivity, Hold function freezes current reading, Four rotation speed units are selectable in, Contact mode: rpm, m/min, ft/min, yd/min, Sleep mode can be disabled, Low battery icon indicates weak power, Three steps to switch to non-contact mode