URS is most reliable RC switching system on the RC market.
This small circuit comparing last 20 transmission signals and switching when only all signals same and ignoring all glitches. And Switching system totally isolated from RC side with a 5000V optical isolator.

Usages

• Isolated ON/OFF for noisy fuel engine ignition systems
• Switching Flight Lights (or high voltage flash circuits)
• Rocket or fireworks ignition systems

• 0.4 second delayed on/off with 20 times signal comparasion
• 5000Volt isolated between Switch and RC sides
• New Technology high current FET switching system
• All vibration resistancy without mechanical parts like relays
• Low Quiescent Current (50uA on 5Volt)
• Very Low Internal Resistance (0.006 Ohm on 5V)
• Wide Operation Voltage (2-30Volt)
• Very High Current Resistance (20A Continuous, 100A Pulsed)
• Onboard LED indicator
• Large Soldering Pads/Silicon cable for easy connection