1、This speed controller has a delicate and practical housing which is waterproof so you can use it out of doors 2、Comes with screw terminal and a indication label of power and motor electrodes for convenient wiring 3、DC motor controller input is connected to direct current, can not be connected to alternating current, or it will be burnt 4、Make sure the positive and negative polarity is connected correctly, otherwise the controller will be damaged 5、Suitable for 12V motors with power less than 120W, 24V motors with power less than 240W, etc Description: Features: This speed controller has a delicate and practical housing which is waterproof so you can use it out of doors. Comes with screw terminal and a indication label of power and motor electrodes for convenient wiring. DC motor controller input is connected to direct current, can not be connected to alternating current, or it will be burnt. Make sure the positive and negative polarity is 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. Specifications: Potentiometer Resistance: B100K Input Voltage Range: DC 10V-60V 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" Package Includes: 1 x Speed Controller