Features 1,Smart Control: Through PWM control, the motor speed controller can adjust the input voltage to DC 1.8V, 3V, 5V, 6V and 12V. 2,Better Design: This ultra low volt DC motor regulator also has potentiometer with switch function and power on indicator. 3,Higher Safety: The resettable fuse will automatically disconnect under high current, which will recover when cooling down. 4,Practical Use: Allows for wide application on fans, fish tank oxygen pumps and other devices, very stable and practical. 5,Easy to Install: Comes with a compact size and a light weight as well, the installation is very convenient to complete. Specification Item Type: Motor Speed Controller Material: PCB Speed Switch: 1803BK Maximum Output Power: 30W Maximum Continuous Output Current: 2A Package List 2 x Motor Speed Controller 2 x Speed Control Knob 2 x Washer 2 x Nut Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.