On May 16, 2019 at 23:04, Ernie Gilman said...
A client/friend in Arizona has a ranch where one of the buildings is called The Hotel. There are four bedrooms upstairs there. They have twin/king RF-controlled mattresses, two per room, four rooms... and there are a total of 6 RF frequencies.
It has happened that a person raises their bed in the middle of the night, awakening a person in another room, who then lowered the mattress.... etc.
I have seen this with ceiling paddle fans too.