There was a lot of stinky winky talk in the early days
leaving the receiver at home !!
can honestly say I don’t think it’s ever happened as usually the receiver is kept in the same bag as the alarms.
what if the receiver packs up !!
what if a normal receiver packs up
you still missed the bite either way.
i think in the 20+ years they have been available they have proven very reliable and the only problem anyone reported was sticky cases..