Feature: Waterproof, anti-leakage housing, high performance drive module. Potentiometer comes with switch, more convenient and safe to use. Fine workmanship and good performance. Stable and reliable. Durable in use. Specification: Size: about 88 x 59 x 35mm Input voltage: DC10V-60V Recommended voltage: DC12V-48V Control power: 12V-120W; 24V-240W Rated continuous current: 10A Max. Current: 20A Speed control range: 5% -100% Switching frequency: 25 kHz Potentiometer: Band switch, B100K Note: This module is speed controller, not the inverter, can not change the voltage. It can not be connected to the AC 220V power supply. The input voltage should be DC, current and voltage must be in accordance with the specified value. Positive and negative poles of the power supply can not be reversed. The positive and negative poles of the motor can be reversed. Please allow 1-5mm for manual measurement. The object color displayed in the photos may look slightly different on your computer monitor because the monitors are not calibrated the same. Actual object may have logo. If you want to know, please contact us. Please do not bid if you mind. Thank you for your understanding! Include: 1 x Speed Control