At first I was skeptical because some have written that will consume the power socket is switched off up to 7 watts. I can reassure all prospective buyers, which is not the case! The ammeter has all Funksteckdosen I bought 0.02A or 1Watt displayed which can not really be because 0.02A are computationally 4,6Watt. But the measure in conjunction with various bulbs (25, 40 and 60 Watt) has shown with intermediate wireless socket always one watt more, so I am assuming that the Stromkostenmeßgerät at low amperage has a deviation. There has, however, only one watt longer displayed in conjunction with the light bulbs I am assuming that this is the real power consumption. This results in a consumption per year and gives outlet (standby) of 8,76kwh! The setting is very easy. All doses are factory set to the D button then you have to change only by the small switch resets (under the cover of the can) for D and just another a, b or c switches. This can really everyone! Price - performance !!! very good