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A must for large scale electric airplanes. Simply install the receptacle to the fuselage side and connect the battery and ESC. Plug or unplug the connector key to turn the power on and off. With jumper key removed, you can plug in battery then hold the mountable momentary contact switch button in for 3 seconds. The caps in your ESC will be charged for no big "spark" or "Fussszzzp" sound when plugging in your jumper key or battery. 12 gauge wire for high amp applications. Compatible with Ultra Dean's connector.
 "MPI 12g Hi-Current No-Spark Arming Switch Deans")