Hello, I am very happy to serve you.★Product parameters: ★Input voltage: DC9-60V (universal)Output voltage: linear under loadOutput current: 0-20A (within 18A for long time use, pay attention to keep the module cool and cool)Ultimate power: 1200WSpeed type: PWM adjustmentSpeed control mode: potentiometer (linear)Speed range: 0—100% Control frequency: 25KHZModule size: 92MM*52MM*36MMProduct net weight: 130 gramsAccording to the installation size: the back fixing hole center distance 104MMPotentiometer according to the opening: 7MMAfter-sales warranty: This product can be returned or refunded for any quality problems within two years. ★Connection method: ★Red line connection: positive power supply +Black line connection: negative power supply -Blue line connection: motor positive +Green line connection: negative - ★Please note: ★1. This governor is used for DC brushed motors.2, not suitable for DC brushless motor speed; can not be used as a regulator or regulator!3. The motor can be divided into positive and negative. When the running direction is inconsistent with the expectation, the direction can be changed by adjusting the line sequence.★ Package includes: ★1 × DC governor 20A2×Quick connector★Special reminder: ★The DC motor governor is connected to the DC power supply.Never connect directly to home 110V AC.Otherwise the damage will be at your own risk!