TECHNICAL INFORMATION POWER SUPPLYPower source 2 x 1.5 V AA (LR6) batteriesVoltage range 3.6 V to 1.8 VCURRENT CONSUMPTIONPower on, backlight off ~ 50 mAPower on, backlight on ~ 200 mASleep mode ~ 10 mAPower off < 1 μABATTERY LIFETIMEBacklight off > 50 hBacklight on > 15 hTIME OUTSSleep mode 30 sAuto shut down 120 sENVIRONMENTAL CONDITIONSTemperature range -10º to 60º C (14º to 140º F)Humidity range 0 to 100% rHProtection class IP54STANDARDS AND REGULATIONS APPLIEDBs1881 part 204; DIN1045; SN 505 262; DGZfP B2