2PCS DC Voltage Motor Speed Controller 1.8V 3V 5V 6V 7.2V 12V 2A 30W PWM 1803BK 1803B Adjustable Driver Switch
https://www.vogueparade.com/shopping/EN/200185144/1/1005003474167120/2pcs-dc-voltage-motor-speed-controller-18v-3v-5v-6v-72v-12v-2a-30w-pwm-1803bk-1803b-adjustable-driver-switch//