Duokon Household Intelligent Power Electricity Saver, Energy Saving Box Device 30%~40%

I recently received two so-called power server devices which I ordered a couple of weeks ago from Aliexpress according to the manual the product promises to actively monitor and improve the power factor optimizers the wood age and current amounts and thus reduce my electricity bill up to 35% all of that is possible by simply plugging the gadget into the wall sockets and since pretty much every feedback on their site is positive it has to be true right well in this video let's open up those devices learn a bit about reactive power and finally discover the truth of this high efficient technique of Germany let's get started first off I cracked open the plastic power saver by unscrewing one hidden screw and applying a bit of force inside I found a PCB you will refuse for badly soldered and resistors to green LEDs and literally a black box which is connected in parallel to the mains inputs a