超聲波測(cè)距儀AR821 MeasuringRange 0.30～15m 0.30～15m 0.30～15m 測(cè)量范圍 10inch～50foot 10inch～50foot 10inch～50foot Accuracy 1% 1% 1% 測(cè)量精確度 MeasureInImperial/Metric 公英制轉(zhuǎn)換 DynamicDisplay 動(dòng)態(tài)讀數(shù)顯示 LaserPointerAiming 激光定位 DataStore/Recall ____ ______ 存儲(chǔ)/調(diào)出數(shù)據(jù) ComputerAreaAndVolume 計(jì)算面積和體積 SumOfLength 計(jì)算長度累加 Auto/ManualShut-off 自動(dòng)/手動(dòng)關(guān)機(jī) LCDBacklight LCD背光顯示 responseTime 2s 2s 2s 響應(yīng)時(shí)間 MeasureingBenchmarkSetup 測(cè)量基準(zhǔn)設(shè)置 KeySound,BeepsForWrongReadingAndReadingConfirmation 按鍵聲提示,出錯(cuò)聲音提示