This speed controller has a delicate and practical waterproof casing, so you can use it outdoors Equipped with screw terminals, power supply, and motor electrode indicator labels for easy wiring The input of the DC motor controller is connected to DC power and cannot be connected to AC power, otherwise it will be burned out Ensure that the positive and negative terminals are connected correctly, otherwise it may damage the controller Suitable 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 Maximum current: 20A Speed range: 5% -100% PWM frequency: 25Khz Dimensions: 88 x 59 x 35mm/3.46 x 2.32 x 1.38 Screw hole size: 8mm/0.31 Package includes: 1 speed controller