This product corresponds to a simple problem: how to automatically turn off the power of a device, when it switches to standby. Yes we can put a plug with a switch, but sometimes we forget to turn it off. Setup is simple, hard to go wrong. And it is very effective, it works perfectly. Very easy to use. If the day of your appliances consume more 30W (fairly common for several devices), this jack pays for itself in less than 6 months.