They are kept on a very tight (*necessarily* tight) electronic leash by Ground Control.

They have you on an electronic leash.

"How long before you're free from that electronic leash?"

Relevant approaches are described as an electronic leash or its equivalent, a wireless key.

Being placed on an electronic leash, yankable at any moment, carried reachability to an offensive extreme.

All of those shrill rings made me feel like I was on an electronic leash.

Now that wirelessness is next to godliness, what excuses can we come up with to slip today's electronic leashes?

Why the rush to put every man, woman and child on an electronic leash?

His desire to avoid what he called "the electronic leash" seems the exception, not the rule.

Respective products are in preparation, following the concepts of electronic leash.