RCEKS-5G - the 5th Generation of the 2-stroke RC engine kill switch designed and made in Australia. With new updated firmware and wider operating voltage. It is a 3 in 1 version (version RCEKS-2G, RCEKS-3G and RCEKS-4G). It works with most 3 or 4 channel radios. RCEKS-5G will automatically kill the engine if you have a low battery, radios glitch, lose connection, or power loss. You can also kill the engine anytime you want via the transmitter`s channel switch. It kills the engine by using a mechanical relay that gives a full electrical isolation Features Include: 1 x pre-soldered EMF noise filtering engine stop switch with quick disconnect plug 1 x Futaba Y lead 1 x Direct Servo Power Supply Cable 1 x remote super bright red LED indicator so the kill switch status signal can be seen externally LED Signal Status: - Flashing: No Radio Signal - ON: Engine On (or Ready to Start) - OFF: Engine Off - ON/OFF/ON: Engine On ( Applicable to Spektrum Radios Only) Specification: - Operation Voltage on the receiver: 4.0 Volts to 12.0 Volts - Relay Voltage Max: 125VAc, 24Vdc - Contact Relay Current DC Max : 1A - Relay Coil Resistance : 167 Ohm *note- This is similar to the Micron T kill switch but does not have adjustable voltage settings.