... off.♦May setup the meter number, bureau number, time period, rate, date, password and initial electric power.♦Password and program switch ... Battery Voltage3.0 or 3.6VDCData Preservation Time≥10yearsRS485 CommunicationBaud rate: 1200bps~2400bpsInfrared CommunicationCommunication distance: ≥4m; Communication angle: ≥±15oPotential StartPotential start ...