There are earpieces which can’t be seen and completely go into the ear. With a scanner and a competent person behind it those signals could be picked up easily.
Anyway I always thought they BOTH use earpieces. It’s just impossible to remember so many numbers about so many different issues imo.
There are earpieces which can’t be seen and completely go into the ear. With a scanner and a competent person behind it those signals could be picked up easily.
Anyway I always thought they BOTH use earpieces. It’s just impossible to remember so many numbers about so many different issues imo.