Hi
We find these products all the time.
In Europe there are a few organisitions that can aprove products and electronic gear to get a CE stamp , we always joke and call it a Chinese Export stamp.
We very often find products like computer speakers and switching power suplies, even LED light bulbs, that have filtering parts left out, to produce it more cheaply.
The problems you get with the power suplies and light bulbs are RFI as QRM in recieving on HF.
The other problems you get is products will not withstand HF radiation and start to act weird.
PSU that fall into shortcut safety mode.
Blown up router ports etc.
SSB signals will come in through the PC speakers etc.
Yes the lights that you will only have to touch to get them on in 4 levels are the most fun in SSB they go on and off and walk through the cycle the whole time you are transmitting.
The infrared detectors on outdoor garden lights, great fun especialy the 1000 watt light version.
Light on and off as often as you like hihi.
Also lovely was the coffeemachine that produced a unwanted cup of coffee when we went to CW TX.
Automatic garden sprinklers that would go on in the middle of the night etc.
CD player that shut off when I produced 80 mtr TX.
The biggest fun was wireless mouse and computer keyboards.
You keyd the mike on 433 MHz and your neighbour can not type no more and his mouse stopped working.
Overhere the 70 cm band is 430-440 and loads of gadgets used that band from 433-440.
Wireless headphones are on 70 cm, garage door openers, wireless doorbells, car alarms, remote light switches, wireless weather stations etc, etc.
If we key 50 watts on 434 MHz, all those gadgets would fail in a radius of about 100 yards or even further, big fun, cars not starting garages will not open, or open when not wanted, car alarms going of, lights switching on or off, babyphones doing weird.
Range Rovers wouldn't start also.
We even found a reasonable large bank here had an alarm that you could trip with 100 watts of power on 10 mtrs, The police had to come a few times a month for falls alarms, we could open every Opel Vectra (Vauxhall) central door locking system with 25 watts of RF on 10 mtrs.
A Peugot 205 could not stand 25 watts of 2 meter power and its dashlight for engine management system problems would go on, and it would not go off no more without disconnecting the car battery for 5 minutes.
73 Jos