More Information22Precautions for AC power• Before operating the unit in a new area for thefirst time, it is absolutely necessary to check thatthe operating voltage of your unit is identical tothe voltage of your local power supply.• Remove the power jack from the unit if batterypower is being used.• If the unit is not used for a period of time,remove the plug from the AC mains.• AC/DC adapter is for indoor use in dry roomsonly.Power Supply• Power supply: (battery power) AAA x 2, (AC/DCpower) 4.5V.• Caution: When you purchase an AC/DC adapter,make sure the polarity diagram is identical asbelow:EN5008 EN 8/28/01, 4:05 PM23