Google the term Wifi Jammer, they can be purchased from Amazon and jammers can be purchased to jam not only Wifi but any other signal including Blue Tooth.
I’ve watched video on how to create a device to open car door, in some cases you could even start the car.
Basically, any device that emits an electronic signal, can be jammed, duplicated or retransmitted and used for exploitation.
The was a few articles, at least one posted on FR if I recall correctly, that reported how these were being used, maybe in Memphis, to break into and steal cars. Pretty much defeats your security system. Haven’t read how national this problem is but I suspect anything secured electronically, especially wireless, is at increasing risk.
I've looked. Show me where I can purchase one on Amazon or any reputable retailer.