A device is advertised on getecotex.com that supposedly helps save electricity. Similar devices are also available from other providers and in other forms.
What all devices of this type have in common: it is a scam. From a purely technical point of view, what is promised there is not possible!
See also the videos from bigclivedotcom:
Power saver plugs just got a bit darker
Worst fake “power saver” plug yet
And EEVblog :
