Mini DC-DC 4.5V-35V 5A 90W PWM DC Motor Speed Controller Module Speed Regulator Control Adjust Board Switch 12V 24V PN35
https://www.vogueparade.com/shopping/EN/1537/1/1005003643359024/mini-dc-dc-45v-35v-5a-90w-pwm-dc-motor-speed-controller-module-speed-regulator-control-adjust-board-switch-12v-24v-pn35//