1Multifunctional: Specifically designed for LP record players, the record player turntable strobe disc is meticulously calibrated to ensure accurate adjustment of the cartridge position for optimal sound quality and performance. 2Dual Sided Design: This turntables tachometer disc Features a dual sided functions, one side of the disc is dedicated to testing turntable speed accuracy, while the other side allows for easy adjustment of overhang and azimuth angles, providing comprehensive calibration capabilities in one convenient tool. 3Excellent Acrylic Material: Crafted from excellent 3mm thick acrylic material, the professional speed test disk is sturdy, robust, and easy to clean, guaranteeing long lasting performance and reliability for all your listening needs. 4Compact And Portable: With a diameter of 297mm, this turntables calibration disc is perfectly sized for compatibility with various turntable models, offering ease of portability and hassle free storage when not in use, making it a versatile and practical accessory for enthusiasts. 5Easy To Use: The record player speed disk simplifies speed adjustment with its intuitive design, allowing for easy calibration by observing the marker stripes under nature light. This user friendly feature enables accurate speed assessment, ensuring optimal playback quality and enhancing your overall listening experience. 1 xRecordPlayerSpeedDisk