OFFICIAL Audio-Technica STROBOSCOPE DISC AT6180a.(released on April 13th, 2018 in Japan)It is sent from JAPAN by AIRMAIL with TRACKING NUMBER.- A stroboscope to check the rotation speed of the turntable.・For 33-1/3, 45 rpm, 50Hz/60Hz compatible.- Equipped with an overhang gauge of 10 to 20 mm.[How to use the stroboscope] Place this product on the spindle of the turntable and rotate it at the speed you want to check. Apply fluorescent light to this product and adjust the rotation speed of the turntable until the dotted line indicating the rotation speed and frequency stops. *The dotted line at 50Hz/45rpm appears to flow slightly theoretically. *Depending on the performance of the turntable and power supply conditions, the dotted line may stop completely and you may not be able to see it.　[How to use the overhang gauge] Place this product on the turntable spindle. Select the number underline and black circle display that matches the tonearm, and adjust so that the stylus tip of the cartridge is aligned. Please contact me if you have any question about this item.Import duties, taxes and charges are not included in the item price or shipping charges. You may be responsible for these charges in your country. Please check with your country’s customs office to determine whatever these additional charges/costs will be applied before you place order. Please contact the seller or check the manufacturer’s website when you have any queries or questions on the specifications and its features. Once you click the ‘BUY IT NOW’ button, you acknowledge you totally understand the product features and its specifications.