The Extech 461880 Combination Vibration Meter and Laser Tachometer measures Acceleration, Velocity, Displacement plus Contact/Non-Contact RPM and Linear Surface Speed. Vibration Meter features remote sensor with magnetic adapter on 39-Inch cable, 10Hz to 1kHz frequency range, RMS or Peak value modes, and manual/auto store of up to 1000 readings. Tachometer features a laser for non-contact measurements of up to 4.9-feet, plus store/recall of last/min/max readings. Characters on the display reverse direction depending on contact, photo, or vibration mode.