This is a simple and easy-to-use DC motor speed controller with mini size, elegant appearance and stable performance. It is made with high quality circuit board which ensures a longer service life. The input voltage can be DC 6V to 30V. This speed controller is quite convenient to use. Features: The adjustable voltage range can be truly smooth. Suitable for DC motors within 8A. High quality circuit board ensures stable and durable performance. Easily control voltage and speed via the adjustable rotary knob. High efficiency, full-automatic forward and reverse rotation, low heat generating. Specifications: Input Voltage: DC 6-30V (The specific voltage is equal to the rated voltage of the motor) Output Current: 10A Input Current: Larger than the motor working current Forward and Reverse Rotation: Full-automatic (1 minute forward rotation then 1 minute reverse) Continuous Current: Within 8A Speed Adjustment Mode: Potentiometer (270° linear) Adjustable Speed Range: 0-100% Applicable Motor: Brush Motor Connection Mode: Barrier Terminal Block Knob Type: 100K (with switch) Size: Approx. 60*60*28mm/2.4*2.4*1.2inch Weight: Approx. 67g / 2.4oz Package List: 1 x Speed Controller Note: This DC motor controller input is connected to direct current, CANNOT be connected to 220V household electricity. Make sure the positive and negative polarity is connected correctly, otherwise the controller will be damaged. The input voltage shall be equal to the motor's rated voltage. (Within 6-30V) 1、The adjustable voltage range can be truly smooth 2、Suitable for DC motors within 8A 3、High quality circuit board ensures stable and durable performance 4、Easily control voltage and speed via the adjustable rotary knob 5、High efficiency, full-automatic forward and reverse rotation, low heat generating