Features: This device allows you to safely and remotely kill your electronic ignition equipped engine form your transmitter. This kill switch is Fiber Optically Coupled to isolate your ignition system form your radio system. (No Interference ) Includes a remote mountable bright LED to indicate when the ignition is armed. Fiber Optic Coupled Input/output. PIC12F675 Controller. Li-Po/Li-ion/A123/Ni-Mh/NiCad Input. Up to 20 Volt 16 amp MOS-FET(IRF7456) output. Low to 3 Volt 3 amp OUTPUT. Low Voltage Drop-Less than 150mv. 100 Surface Mount Technology. Heavy Gauge Wires, universal connectors. Small and light weight-only 0.3 OZ (8g). Shut down the transmitter power or receiver to cut off automatically when kill engine. This device plugs into a spare receiver channel. This is a must have safety device for any gas powered plane This device allows you to safely kill your engine at anytime(on the ground, or in the air ) Or when out of control also allows kill the engine. Color: see the pictures Material: plastic,metal Sales Way:Retail, Wholesal,Drop Shipping size: One Size Length: 40cm (15.75in) Width: 1.7cm (0.67in) Height: 0.7cm (0.28in) Quantity: 1PC Note: If you have big quantity (over 50 dollars), please feel free to contact me, I will give you best discount, thanks Size For Manual Measurement, there may be a 0 to 2 cm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: (Without retail package) 1 x Ignition Cut Off