That means no loud pops and bangs when inserting and pulling out the dongle.-Lightweight, solid feeling dongle

No "pop" when plugged or unplugged (our church appreciates that).

Immediately there was continuous static, and a "pop" every few seconds

There is an automatic muting feature built-into the transmitter so it does not make the characteristic loud pops when the cable is unplugged or plugged into a powered-on amplifier, so there is no worry about turning the volume off to avoid potentially damaging the amp, ear drums or startling anyone

No noise or loud pops.