Features Compact Design for Easy Installation - This mini speed controller features a small footprint and includes a fixing screw hole for hassle-free mounting and stability Versatile Voltage Range - Operates efficiently between 4.5V and 28V, allowing compatibility with various DC motors for versatile applications High Power Efficiency - Capable of handling output currents up to 5A with a maximum output power of 90W, ensuring reliable performance for demanding tasks Adjustable PWM Duty Cycle - Offers a customizable PWM duty cycle ranging from 1% to 100%, enabling precise control over motor speed for optimal performance Durable Construction for Longevity - Built with high-quality materials to provide robustness and extend the service life of the speed controller, ensuring long-term reliability Features: 1、PWM DC motor speed controller with switch function.Small size, low power consumption, fast response. 2、High power high efficiency, It is and reliable with good long？term stability. With fixing screw hole, convenient for install and fixed. 3、Working voltage can be switched to 4.5V？28V by bridging the connector marked "4.5V？35V" 4、The product working voltage is DC4.5V？28V, output current is 0？5A, output power is 90W (large), quiescent current is 7u A (standby state), PWM duty cycle is 1%？100%. 5、Using high？quality materials, strong and , has a long service life. Specification: Item Type: Speed Controller Working Voltage: DC4.5V-28V Output Current: 0-5A Output Power: 90W (large) Quiescent Current: 7u A (standby state) PWM Duty Cycle: 1%-100% PWM Frequency: 20khz Package List: 2 x Speed Controller 2 x Gasket Note: betweendiv>The input of the DC motor speed controller is direct current, and cannot be directly connected to alternating current (for example: household 220V alternating current), otherwise it will burn out! ! !between/div>betweendiv>Do not connect the positive and negative terminals of the DC power supply in reverse, otherwise the governor may be damaged.between/div>betweendiv>The motor can be positive or negative. When the running direction is inconsistent with the expectation, the direction can be changed by adjusting the line sequence.between/div>betweendiv>Adjusting the potentiometer knob can change t Package List 2 x Speed Controller 2 x Gasket