Features 1、PWM DC motor speed controller with switch function.Small size, low power consumption, fast response. 2、High power high efficiency, It is precise 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 durable, 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