PWM HHO RC DC Motor Speed Regulator Controller Switch Control  Specification:<br> Voltage: 12V - 24V DC Current: 3A Regulation range: PWM 0% - 100% of power Dimensions: 6.05 x 4.4 x 2.2cm \/ 2.40 x 1.73 x 0.87inch Hole distance: 3.38 x 5.08cm (1.33 x 2inch) Hole diameter: 0.37cm \/ 0.148inch<br> Package included:<br> 1 x Motor speed controller