No instructions. You have to understand it yourself. When I started it a second time, one of the pulleys flew off. It wasn't tight.
Pros
π§ADJUSTABLE 4 SPEEDS: Adjust the machine's speed according to your workpiece needs. The speed can be adjusted by adjusting the position of the belt after opening the machine's protective cover. 4 kinds of speeds 3400rpm, 1100rpm, 1600rpm, 2300rpm can be set freely according to your needs.