This speed controller has a delicate and practical housing which is waterproof so you can use it outdoors Comes with screw terminal and a label indicating the power electrodes and motor for convenient wiring DC motor controller input is connected to DC, cannot be connected to AC, or it will be burned Make sure the positive and negative polarity are connected correctly, otherwise the controller will be damaged Suitable for 12V motors with power less than 120W, 24V motors with power less than 240W, etc. p> Product description 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