Specification Model CCM6CInput voltage 6V 12V 24V DCControl Power 24V within 200W 12V within 120W 6V within 60WCurrent Sustained current maximum 20A suggest use within 10APWM Duty Cycle 5 100 almost 99 motor included PWM Frequency 21KHz It means with very low voice when low speed Size L W H 6 x 5 x 2 7cm 2 36x1 96x1 06 Package Included 1 x CCM6C Mini PWM DC Motor Speed Controller