ITEM NAME:20A RC ESC Brush Motor Speed Controller w/ Brake for RC Car Boat Tank Control Product Description Description: Features and Functions: 1. Connect the power supply and motor, insert receiving machine, and then there will arise a sound of "DO" which means the ESC has been.Continuous 20A. Driving frequency: 2 KHZ. Weight: 11 g (including wire and plug). Center of a learning finished and start working. 1 X 3 p line black (cathode), red (the anode). The white line (Signal).