Features: The tape recorder speed disc is an accessory used for record playback equipment, mainly for adjusting and testing the speed of the turntable to ensuring sound quality and playback effect. The speedometer usually has standard clear speed markings(33/45/78 RPM), which can help users confirm the accuracy of the turntable at different speeds. Easy to use, simply place the speed testing disc on the turntable and start it to observe the speed, which is very convenient. Quality, it has certain wear resistance and is lightweight and easy to carry. For audiophiles, record collectors, and those seeking professional equipment maintenance, this is essential. Specifications: Component: Acrylic Size: approx. 40cm/15.74inch Package Includes: 1Pc Turntable Speed Tester note: Other accessories demoed in the pictures is not included. Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.