In other words they’re good at knocking on the wall.
Comment on I am not a builder… but that does not seem right
Zozano@aussie.zone 2 months agoThey’re more like depth detectors now. They dont work on magnetism, they work by detecting the ultrasonic echoes of what’s behind the wall.
barsoap@lemm.ee 2 months ago
MNByChoice@midwest.social 2 months ago
Both kinds exist.
It is helpful to have both.