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.
The Ultra Reliable Switch designed for Glow or Small EP planes. Standard slider type switches are the most important crash reason on glow planes and they can affect from vibration, dust, oil and moisture.