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Strobodisc "SPEED" (AC 038)
+ 300Hz Laserlight (AC 039)
With the Clearaudio Stroboscope Disk you now have the tool to accurately tune the speed of your turntable. The Strobodisc’s break-in groove creates the additional stylus drag necessary to accurately measure the realtime speed of your turntable and it can also be used to break-in new cartridges. The 300Hz strobe light allows you to practise the most precision measurement of the actual turntable speed.
以上摘自http://www.clearaudio.de/res1/en/index.html