4 Wire Controller, Stepper Motor Driver - Speed Adjustable With Remote. Specifications: Motor Type to Be Driven: 2-phase 4-lead-wire (3-24 V of the Stepper Motor Can Drive the Rotation but at Different Torque) Speed Indicator: 9 Levels Can Adjust Speed by Button on Board or by Remote Controller Board Size: 52 * 36 Mm The Video Address:v.youku.comv_showid_XNTg4MjAwNzUy.html Type: Press 'forward' Once, the Motor Begins to Run. Press 'forward' Again, the Motor Stops. And So Goes On. This Also Applies when We Press 'backward' Package Included : 1pcs Stepper Motor Driver Controller Speed Adjustable Board 1pcs Remote Control 1pcs 2p Power Wire 1pcs 4p Plug Wire . 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.