320A Regler Bürstenmotor Drehzahlregler Weg für RC Auto Boot Modell9987
Turn on the power switch of the ESC and the motor make a "beep" sound. Special note: This ESC can only be used with motors no larger than 380 when using 3S (12V). It can only be used with motors no larger than 540 when using 2S (8.4V).