Input voltage: AC 220~250V; Differential: 0.5K; On opening contact: 10A~250V AC; On closing contact: 3A 250V AC; After almost two days from the insallation, to obtain a precise scale adjustment, measure the room temperature with a reference thermometer, placed sside the thermostat. Holding the shagrened part of the knot, turn the dndex with a coin, to reach the same value of the thermometer. We suggest to install the euipment at about 1.5m form the floors and far from any heat source.