Operation guide: 1. Correctly connect it to the power supply battery. The red wire at both ends of the terminal board is the positive pole, and the black wire is the negative pole. (or connect standard DC battery plug) 2. The red and black wires of the ESC output are connected to the red and black wires of the car's 540 motor respectively. 3. Turn on the power switch of the ESC and the motor make a "beep" sound. Then turn on the power of the transmitter and the motor make a "doo~la~mi" sound, proving that the remote control signal has been successfully connected to the ESC. Due to different batches, there may be differences in the appearance, color, and printing of the product, which not affect its use. Features: 1. Automatically find the center position. 2. High frequency drive system 3. Use low internal resistance field effect tubes 4. Suitable for use in car and boat models 320A high voltage version brushed ESC, two-way waterproof ESC for remote control car supports 3S lithium battery 320A two-way high-voltage electronic speed regulator with brake (with waterproof function) Battery support: 4~6 sets of nickel metal hydride and nickel cadmium (4.8V~7.2V); 3 sets of lithium batteries (6V-12V) Current parameters: forward 320A, reverse 160A, brake 270A, BEC output: voltage 5.6V, current 2A. (Supply power for receivers and steering gears) 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). Material: plastic colour: black Package Contents: 1 x ESC Brush Motor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.