Product Review

RioRand 12V-40V 10A PWM DC Motor Speed Controller w/ Knob--High Efficiency, High Torque, Low Heat Generating with Reverse Polarity Protection, High Current Protection

From left to right they are Motor-, Motor+, Power-, Power+

Features:
Control the speed of a DC motor with this controller
High efficiency, high torque, low heat generating
With reverse polarity protection, high current protection
Size (L x W x H ): Approx. 73 x 60 x 27 mm
Material: Plastic, metal

Package Including:
1 x RioRand Speed Controller