This speed controller has a delicate and practical housing that is waterproof so you can use it outdoorsComes with screw terminal and power and motor electrode indication label for convenient wiringDC motor controller input is connected to DC current, can not be connected to AC current, or it will be burnedMake sure the positive and negative polarity are correctly connected, 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 Tap Hole Size: 8mm/0.31 The package includes: 1 x speed controller