Small and light weight only 0.3 OZ! (8g), Package Includes: 1X Opto Gas Engine Kill Switch Version 2.0 for RC Model Gasoline AirplaneSupport Li-Po/Li-Lon/A123/Ni-Mh/NiCad Input, Up to 20 Volt 16 amp MOS-FET (IRF7456) output.Super versatile, It can be used with auxiliary channel to connect to a smoker or a retractable landing gear.Includes a remote mountable bright LED to indicate when the ignition is armed.This kill switch allows you to safely and remotely kill your electronic ignition equipped engine from your transmitter, giving you a sense of comfort. The engine can be remotely shutted off even when it losts signal or the transmitter is turned offIt is Fiber Optically Coupled to isolate your ignition system from your radio system. (No Interference!!) Reverse voltage protection circuits prevent damage to power supplies and electronic circuits in the event of a reverse voltage applied