Five different cylinder combinations, 2,3,4,5 and 6 Throttle channel feed thorough to speed controller, for ease of use. Push button setting for easy selection of number of cylinders. Auxiliary output for power amplifier Speed adjustment potInstructionsPlug the sound unit in to you throttle channel of your receiver and plug your speed controller into the socket lead on the unit. Now wire up a loudspeaker of your choice to the terminal block provided, which must be no lower than 8 Ohms.Set-upSetting up is straight forward, with your receiver turn off and your transmitter on, hold the setup button down switch on your receiver while still holding the button down, you will hear a beep from the loudspeaker, as soon as this happens let go of the button.The unit will now go thorough all of the 5 different cylinder combinations, when it plays the one you like push and hold the button once more while it is still playing the sound you like and a second beep will sound to tell you that it has lock that sound. When you