Plays of the mains voltage (ERDF) and the current consumed. Attention however the values are only indicative but it is always boring to know how is our conso '. Do not forget: P = U x I to know the Watts. Surtou and you have to pass in the hole planned for this purpose one of the arrival of the cable EDF sector. The one that comes from the head of your installation breaker. Think also protect the voltmeter with a dijonctor 2A (this also allows it to turn off ...) Regrets are: lack of crete from memory, display of extinction Absence. Green display I and U of red! The reverse will have been conventional, is not it?