General Features: Protection cover for the adjustment keys; Display
flashing in case of low batteries charge; Maintenance of all data during
batteries replacement; Double insulation; Protection degree IP20; Battery
operation life of approximately 2 years.
Electric Features: Contacts rating 5(3)A 250Vca; Software class A; Type
of action: 1BU (micro disconnection); Voltage-free switching contact; Power
supply with three 1.5 V AA alkaline long life batteries without connection to
the electric circuit.