Stepper Motor Speed Regulator Board, Pulse Signal Generator Module. Specifications: This is Pulse Module, Can Provide 2.5 KHZ-68 KHZ Frequency, Supply Signal to Stepper Driver. If You Want to Control the Stepper Motor, You Still Must Use a Motor Driver. If You Want to Change the Frequency Range, You Can Change C46 Capacitance. Power Supply: DC15-80V or DC 12V. Motor Reversing and the Rotation, Stop and Run Can Be Controller by Keys. Motor Speed Can Be Controlled by Adjusting the Potentiometer. Motor Type: DC Motor Packaged Include : 1 X Stepper Motor Pulse Signal Generator Module . We are an international based seller that will ship your order from abroad, please at least a minimum 14 working days for delivery right now due to the ongoing delays in shipments globally.