The Smart-Fly single-receiver Ignition Cutoff is designed for planes utilizing a single receiver for the flight system. The Ignition Cutoff provides safety and convenience for your gas powered plane. The unit has two modules that are connected by a fiber-optic cable. This isolates your radio system from your ignition system both electrically and physically. The physical separation prevents any inducted noise from getting into your receiver as many of the single unit ignition kills can. The unit works off a toggle switch on your transmitter and requires a separate channel to operate it. The LED on the ignition side is removable and extendable with standard extensions. The LED is not required for the unit to operate properly. This unit is designed only for electronic ignitions and will not work with magneto ignitions.