Turntable Strobe Disc, Profesional Lp Turntables Record Disc Calibration Disc Product Details The tachometer is specially designed to detect the rotational speed of your LP record and adjust the position of cartridge and stylus so that you can enjoy high quality sound. A essential adjustment tool for LP record amateurs. Stroboscope mat for LP record head calibration and rotational speed detection. 33/45/78 RPM, 50/60Hz rotational speed detection and adjustment. Check and adjust the angle of the cartridge and stylus. High quality, high accuracy. Thickness: 3mm / 0.12inch. Diameter: 30cm / 1.2inch. A great tool to check whether the rotational speed and angle your record is right or not. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.