... substrate.Such as:(aluminum,chrome,copper,enamel,rubber,paint)on magnetic substrate(steel,iron,alloy and magnetic ... coating layers covered on nonferrous substrateSuch as:(enamel,rubber,paint,vanish,plastic anodic-oxide layer)covered on nonferrous ... 5V AAA(UM-2)batteryBattery indicatorLow battery indicatorAuto switch off√Dimension130x76x31mmWeight(Not including battery)about 340g(not including ...