The 2 in 1 Professional Program Box is a small device to set the programmable parameters of the brushless ESC, it works in the following 2 ways:
Working as an individual device to set the ESC, the value of each parameter is displayed on its own LCD screen;
Working as an USB adapter to link the ESC with a PC, and the user can update the firmware of the ESC or set the ESC by the special application software on PC