This is DLE V2.0 Gasoline Engine Kill Switch.
Allows pilot to shut off their electronic ignition equipped
gasoline engine from their transmitter
Plugs into unused receiver port
Fiber optically coupled to isolate ignition system from radio system
LED indicates when igniton is armed
Compatible with LiPo/Li/Ion, A-123, NiMH, NiCd batteries
Up to 20 volt 16 amp MOS-FET (IRF7456) output
Low to 3V, 3amp output
Low voltage drop, less than 150mv
100% surface mount technology
Gasoline Engine Kill Switch with Universal Connectors and
Instructions
Dimensions: 0.67 x 1.5 x 0.29" (17 x 38 x 7.5mm)
Weight: 0.3oz (8g)