Combining a phase sequence indicator and a motor rotation indicator into a single pocket-size unit, the Fastphaser quickly and easily connects any three-phase motor or generator. It eliminates the risk of personal injury or damage to machinery incurred by “bumping” a motor in the wrong direction, and its wide frequency range covers not only 50-Hz and 60-Hz supplies, but everything from low-frequency traction supplies to aircraft servo systems at 400 Hz and above. Because of its high sensitivity, unit indicates when the machine rotates for just a second or two at one-tenth of its normal operating speed. It is also useful in phasing transformers. Powered by two AA cells with an operating life of 300 hours and equipped with a convenient pocket clip, Fastphaser weighs only 9 oz.