This speed controller has a delicate and practical housing which is waterproof so you can use it outdoorsSupplied with screw terminal and a label indicating the electrodes Power supply and motor for convenient wiringDC motor controller input is connected to DC, cannot be connected to AC, or it will be burned< /li>Make sure the positive and negative polarity are connected correctly, otherwise the controller will be damagedSuitable for 12V motors with power less than 120W, 24V motors with power less than 240W, etc. Features: Potentiometer resistance: B100K Input voltage range: DC 10V-60V Output voltage: 0-100% of input voltage Control power: 12V * 10A = 120W, 24V * 10A = 240W Rated current: 10A Max Current: 20A Speed range: 5% -100% PWM frequency: 25Khz Size: 88 x 59 x 40mm / 3.46 x 2.32 x 1.57" Faucet hole size: 8mm / 0.31" Package includes: 1 x speed controller