Any backup system can be connected to the iKON2: Optipower UltraGuard, Pulse Ultra defender, Scorpion BUG, R2 Capacitor Bank, Buffer Pack for Kontronik ESC’s (Lipo 2S), or others.Normally these systems can be connected to the CH2 connector of the iKON2 or in the GOV connector if the “-” and the “+” of the connector that carries the RPM pulses are free.Otherwise, if the receiver has connectors for free servos, just connect to these connectors.Absent available connectors, just use a “Y” cable connected to any of the iKON2’s connectors except the CH4-5-6 connector, this connector must never see voltage.