Check the listing for details. 2x DC 6V-30V 12V 24V Max 8A Motor PWM Speed Controller W/ Digital Display Switch. Condition: New. Listed at 20.00 USD. Ship from USFast and Free Delivery Brand New Package Inculdes: 2 Digital PWM Features:CCM5D DC Motor Speed Regulator controls the speed of a DC motor by adjusting Pulse-Width-Modulated (PWM). Large 0.56 inch 3-digit LED display numbers allow viewing under the most adverse conditions.Incorporate a push key. Push closed, and then push open. The display range of 3-digit LED display is ¡°000¡±-¡°100¡±. ( For example, displayed ¡°60¡±, it means that the PWM output duty cycle is 60% ) Specifications:Condition:brand newInput supply voltage range : 6V-30V DCPWM frequency :16kHzAdjustable speed range : 0%-100%. Suitable for : the DC motor (or DC load) within 5A, Peak current 8A.Item size: 80x40x10mmNet weight: 60gWARNING: Before you attempting to wire the controller, make sure power is off.DO NOT REVERSE POSTIVE AND NEGATIVE POWER LOADS.THIS WILLDAMAGE THE CONTROLLER. TO CHANGE MOTOR DIRECTION, INTERCHANGE THE POSITIVE AND NEGATIVE WIRES OF MOTOR.Operating instruction:1. Connect wires refer to the ¡°wiring diagram¡±. 2. Turn on the power, and adjust the potentiometer. 3. The LED display displays the PWM output duty cycle. 4. Push the key, the controller closed, push it again, the controller open.