Note: The color of the item may vary slightly due to photography and your own computerFeatures:1.Low power warning.Prevents accidents by detection low power voltage, low radio power voltage, no radio signal, and signal interference.2.Stops vehicle by applying brake servo.Fail-Safe Break Setup1. Connect the fail-safe unit to throttle/brake servo and receiver. Be sure to observe the polarity of the wire leads.2. Connect to transmitter power turn on transmitter, and now you��ll see FS yellow LED lighting, it indicates that the signal is input, servo which connect to FS will receive the signal while operating Transmitter.3. Push the throttler make servo move to idea position, pushing FS Input signal botton, release while red sparking 3 times, then it indicates FS has recorded the signal.4. Turn off transmitter power, and now you��ll see FS yellow LED went out, while red is sparking, Servo is moving to the position which set before.5. Re-urn on transmitter power, FS yellow LED is lighting, servo will move as transmitter moving. All set up is done, you can operate transmitter freely.Working volts: 4.8V-6VLoading current: 7mA(4.8V)Precision scope: <0.3%Dimension: approx. 37mm x 20mm x 9mmWeight: 8gInstructions for use:1. Insert the plug of the product into the receiver throttle channel. At this time, it will display green to indicate that it is working normally. Insert the throttle servo into the socket of this product.2. When there is no remote control signal or outside the remote control area, red flashes, and the throttle is locked. If the remote control signal is restored, the red flashing changes to green, then the accelerator is unlocked and the accelerator can be controlled.3. Throttle lock position setting: When the green is on, put the remote control throttle to the position you want to memorize, then press the button, after the red flashes 3 times, it means that the current throttle lock position has been memorized.4. When the voltage of the receiver is lower than 2.9V, the throttle is automatically locked, and the red is long on, and the lock can be unlocked by re-inserting.Package Include:1x Fail Safe Suit For RC Nitro Car Accelerator