Tonar’s Strobodisc is a 12inch ideal accessory to have when checking and/or adjusting the speed of your turntable. The disc has markings on one side for 50Hz and the other side for 60Hz.
Before using it make sure to check which Hz is needed for you. Many countries use 50Hz but for example in the US it is 60Hz.
The disc does not come with a strobe light but we can suggest finding a strobe light mobile app that can help with testing the speed (8 1/3; 16 2/3; 33 1/3; 45; 78 RPM).