Features:_x000D_ _x000D_ Incorporate a 30A fuse, and with the protection function of reverse connect power supply _x000D_ High Power, Digital Display _x000D_ Potentiometer with switch function _x000D_ Large 0.56 inch 3-digit LED display numbers allow viewing under the most adverse conditions _x000D_ The display range of 3-digit LED display is "000"-"100". (For example, displayed "055", it means that the PWM output duty cycle is 55%.) _x000D_ _x000D_ Specifications:_x000D_ Model: CCM6DS-D_x000D_ Input supply voltage: 12V-80V DC_x000D_ PWM frequency: 21kHz_x000D_ Duty Cycle adjustable: 0%-100%_x000D_ Suitable current range:current rating: 30A_x000D_ Module Size(with case): 110 * 77 * 35mm_x000D_ Display device: 79 * 42 * 24mm_x000D_ Potentiometer cable length: 0.79inch_x000D_ _x000D_ Package Including:_x000D_ 1 x Digital Display CCM6DS-D DC Motor Speed Controller With Case_x000D_ _x000D_ Note: _x000D_ -Do Not Reverse Positive And Negative Power Loads. This Will Damage The Controller. To Change Motor Direction, Interchange The Positive And Negative Wires of Motor._x000D_ -Before you attempting to wire the controller, make sure power is off.