This engine speed control switch can control the engine speed from 0% -100%.

It is widely used in industrial production. Comes with a knob to control the speed of the engine Easy to handle

Comes with a knob to control the speed of the motor 
Easy to use 
Controlled power: 0.01-1000W 
Max. Current: 15A 
Quiescent current: 0.005 A (standby) 
PWM Duty cycle: 0% -100% 
PWM Frequency: 15 kHz 
Control voltage: 0-5V module 
size (L x W x H): approx. 64 x 59 x 22 mm 

Note:

It must be connected to the load to adjust the speed. 
With the power supply reverse connection protection, over-voltage protection, 15A fast fuse ceramic fuse. It can be directly controlled by the PLC voltage.