HPI mini failsafe unit

Protect your car or truck from dangerous runaway conditions with this failsafe unit from HPI. Simply plug it in between your throttle servo and receiver for instant protection, just in case your receiver battery runs low or you lose radio signal while out on the track. Press the button on the failsafe to select the throttle position (neutral or partial brake is recommended) and you’ll be able to drive in confidence, knowing your vehicle and spectators will be OK in the event of radio or electrical problems.

Source: HPI [hpieurope.com]