DT-100B Digital Handheld Stroboscope, LED Flash Strobe Tachometer, Non
Contact Rotational Speed Analyzer Rechargeable 1500

LED - Light Emitting Diode - a small light source

Digital - A system that uses only 0s and 1s to transmit data

rotation - A circular motion of an object around a central axis

speed - A measurement of how fast an object travels between two points

LED - Light Emitting Diode. A bulb that is very efficient at producing light. Often small.

Rechargeable - Something that can be charged back to its original state, e.g. batteries.

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