GENERALFEATURES&SPECIFICATI***一般功能和规格AR-841AR-851MeasuringRange0.5～15m0.5～15m(singleUnit)测量范围1～60m(DoubleUnit)Accuracy&plu***n;0.5%&plu***n;1.5%(singleUnit)测量***度&plu***n;2%(DoubleUnit)MeasureInImperial/Metric√√公英制转换OperationCondition0～30℃0～30℃工作环境30-70%RH30-70%RHLaserPointerAimingSelection√√激光***LowBatteryIndication√√低电显示功能ComputerAreaAndVolume√√计算面积和体积SumOfLength√√计算长度累加Auto/ManualShut-off√√自动/手动关机LCDBacklight√√LCD背光显示resp***eTime2s2s响应时间MeasureingBenchmarkSetup√√测量基准设置SingleOrDoubleUnitMeasureSelection_____√单机和双机测试选择开关WorkFrequency40khz40khz(singleUnit)工作频率20khz(DoubleUnit)KeySound,BeepsForWrongReading√√AndReadingConfirmation按键声提示,出错声音提示以及确认声音提示)