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Input supply voltage: 6V-30VDC; PWM frequency:16kHz; Duty Cycle adjustable:0-100% With infrared remote controller, control on/off, acceleration and deceleration The effective remote control distance is about 3m-4m. With LED digital display, the display range of 3-digit LED display is "000"-"100". With push switch and potentiometer, manual control and infrared remote control 2 in 1.