UsageTips:Thedissolvedoxygenmeterhashigh-precisionandaccuratedissolvedoxygenreadings, whichcanquicklyobtaintestresults. TheBluetoothdissolvedoxygenmetersupportsmobileapplications, withreal-timeandaccuratetransmissionofBluetoothdata. Themeasuredvaluesoftheaquariumwatertestingkitareclearata glance. Allowyoutosave, manage, andsharetestdataatanytime. Thedigitaldisplaydissolvedoxygenmeteradoptsa mobileapptocontrolthebacklightdigitaldisplay. Thedigitaldisplayofthecolorimeterisclearerandeasiertoread. Thedissolvedoxygendetectionkitcancustomizeitsownparameters. Theoxygenmeterwillautomaticallyturnoffwhennotinuseforabout8 minutesandhasa lowbatteryalarmfunction. Measurementrangeofdissolvedoxygenmeter: dissolvedoxygen: 0. 0-30mgL, dissolvedoxygensaturation: 0. 0-300. 0%, temperature: 0. 1-40. 0C; 32. 0-104. 0F. Theautomatictemperaturecompensationofthedissolvedoxygenmetermakesthedissolvedoxygentestmorestable. Ifthecontentinwateris5. 0mgL, aquaticorganismswilldifficulttosurvive. Ifthecontentofthedissolvedis1-2mgLandlastsforseveralhours, itwillleadtothedeathofa numberofaquaticorganisms. Therefore, oxygenmonitorsordissolvedoxygendetectionkitsareveryimportantforaquaculture, biologicalreactions, andponds. Thedissolvedoxygendetectionkitcanbeusedtomeasureandmonitortheoxygencontentthataffectsreactionrate, processefficiency, ortheenvironment. Suchasaquariums, swimmingpools, teachingexperiments, laboratorysterileenvironments, scientificresearch, environmentaltesting (lakes, streams, oceans), wastewatertreatment, wineproduction, etc. Color: Blackmaterial: plasticPackageContents: 1x OxygenMeterOnlytheabovepackagecontent, otherproductsarenotincluded. Note: Lightreflectionanddifferentdisplaysmaycausethecoloroftheiteminthepicturea littledifferentfromtherealthing. Themeasurementallowederroris +- 1-3cm