1、Connect the power supply. After the motor is connected and the receiver is plugged in, there will be a sound of "DO", which means that the electricity is normally turned on. 2、If it is in the center position, the motor immediately emits DO BE MI. If it is not in the center position, the motor emits DO sound. 3、Until the user mediates to the central location, the DO sound stops and immediately emits DO BE MI, and can work normally. 4、LED status, when the remote control is in the center position, the LED will be half on or off; when move forward or backward, the LED will be totally on; when there is no signal, the LED will flash. 5、20A ESC with brake, special designed for RC car boat model, directly fitment. Condition: 100% Brand New Item Type: ESC Material: Electronic components Operating Voltage: 3.0V-- 9.4V Input Signal Type: PPM Drive Frequency: 2KHz Output Current: Continuous: 20A. 30SEC 25A. 5SEC 50A instantaneous current 80A Weight: 11 g / 0.4 oz(approx.) (including wire and plug) Size: Approx. 30 x 23 x 5mm / 1.18 x 0.91 x 0.2in (Length x Width x Thickness) (±1-2cm) The line on JST, red is the positive pole, black is the negative pole 3P line black (negative), red line (positive), white line (signal line) 1 x ESC