C4 Electronic faucets · Installation | 757 M3-E Installation, use and maintenance 1.4. ELECTRIC SUPPLY CONNECTION DC AC 4 X 1.5V LR6 AA 100 - 240 V ALKALINE 50 / 60 Hz Remove the housing box screws and open it. DC supply - Fit four 1.5V alkaline batteries of type LR6/AA with their poles positioned as shown on the battery holder. Fit the battery holder inside housing box. AC supply – Fit the power su pp ly inside housing box. EN