This speed controller features a delicate and practical casing that is waterproof for outdoor use. Comes with screw terminals and an indicator label for power and motor electrodes for convenient wiring. DC motor driver input connects to DC power; do not connect to AC power, as it will burn out. Ensure positive and negative polarity are correctly connected, otherwise the controller will be damaged. Suitable for 12V motors with power less than 120W, 24V motors with power less than 240W, etc. Product Description Features: Potentiometer Resistance: B100K Input Voltage Range: DC 10V-60V Output Voltage: 0-100% of input voltage Power Control Voltage: 12V*10A=120W, 24V*10A=240W Rated Current: 10A Maximum Current: 20A Speed Range: 5%-100% PWM Frequency: 25Khz Size: 88 x 59 x 40mm / 3.46 x 2.32 x 1.57" Terminal Size: 8mm / 0.31" Package Includes: 1 x Speed Controller