[Acrylic Material] Made of high-quality acrylic material, the turntable record disc is sturdy, heat-resistant, and designed for long-lasting use. [Convenient to Use] The LP record tachometer is accurate and easy to use, ensuring proper calibration without interfering with the operation of the record player. [Record Calibration] This calibration strobe disc is an essential tool for LP record enthusiasts, offering reliable performance for turntable setup. [Easy to Operate] Place the disc on the turntable, turn on the light source, and adjust the turntable speed until the pattern on the disc appears stationary. [Main Function] Compact and practical, this turntable strobe disc is designed for calibration and speed verification of LP records. Function: For 33 RPM and 45 RPM turntable speed detection Diameter: 80mm / 3.1 inch Thickness: 7.7mm / 0.3 inch Product Type: Turntable Strobe Disc Color: White Material: Acrylic Package Contents: 1 x Calibration Tachometer Note: Light reflection and differences in display screens may cause slight variations in the color shown in the image compared to the actual product. Measurement error allowance is +/- 1-3 cm.