超聲波測距儀AR821 MeasuringRange 0.30～15m 0.30～15m 0.30～15m 測量范圍 10inch～50foot 10inch～50foot 10inch～50foot Accuracy 1% 1% 1% 測量精確度 MeasureInImperial/Metric 公英制轉(zhuǎn)換 DynamicDisplay 動態(tài)讀數(shù)顯示 LaserPointerAiming 激光定位 DataStore/Recall ____ ______ 存儲/調(diào)出數(shù)據(jù) ComputerAreaAndVolume 計算面積和體積 SumOfLength 計算長度累加 Auto/ManualShut-off 自動/手動關(guān)機 LCDBacklight LCD背光顯示 responseTime 2s 2s 2s 響應(yīng)時間 MeasureingBenchmarkSetup 測量基準設(shè)置 KeySound,BeepsForWrongReadingAndReadingConfirmation 按鍵聲提示,出錯聲音提示