Engine Sound Simulator Speaker Module for 1 or 28 1 or 24 1 or 18 RC Car Universal Specification: Material: plastic shell Product weight: 15g Suitable for models: 1:35 1:28 1:24 RC car universal Packing size:8x12x1cm Style: Diesel version or Petrol version Product Information: Output power: 1W8 ohm 5V or 0.6 W8 ohm 3V Signal input: positive pulse 0.8 ms to 2.0 ms Sound quality: 22.05 kHz sampling frequency Memory: 4M, 22.05 kHz audio for approx. 20 seconds Caution: The power supply voltage of the sound group is up to 5V, absolutely not more than 5V, more than to burn the built-in amplifier and microcontroller, if the BEC of the ESC is 6V, it is recommended to connect 2 series of the BEC to the ESC. If the BEC of the ESC is 6V, it is recommended to connect two 2A rectifier diodes from the receiver to the power supply, the voltage drop is 1.2-1.4V, to supply power to the sound group. Control mode: When the throttle channel is moved for the first time after the control is turned on, the engine sound will start automatically, if the engine idles for more than 20 seconds, the engine sound will be turned off automatically. If the engine idles for more than 20 seconds, the engine sound will be turned off automatically. The engine sound will be activated after the throttle rocker is moved. Neutral Point Setting: Connect the speaker, ESC, receiving (receiving and controlling the frequency beforehand), open the power of the remote control, Power on the receiving, and then use tweezers or other conductive materials to short-circuit (short-circuit) as shown in the diagram, Then it will give out a drop, which means that the neutral point has been recorded, and then the accelerator is pushed to the start or idle point. It is slightly paused, and it will give out a drop, which means that the start or idle point has been recorded, And then the accelerator is pushed to the maximal, and there will be a three drops. Then push the throttle to maximum, it will drip three times, the whole setup is finished. Package Includes: 1pcsxRC Car DIY Sound set Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.