With HOBBYWING's Program Card, you can easily set the programmable values of the brushless Electronic Speed Controller (ESC).
Card has a friendly user interface. It is as small as a business card,
so youcan put it in your pocket when you are on field.
Size: 92mm (L) * 52mm (W) * 6mm (H).
Voltage: 4.8-6V(If the ESC has not a built-inBEC, you must use an
additional battery pack to supply the program card)