Feature:1. Backlight function is supported for easy operation in dark environments.2. Easy to calibrate and with automatic temperature compensation, practical.3. With LED large screen easy to read display, which is convenient to use.4. Equipped with a replaceable pH probe for easy installation and replacement.5. The online PH EC water quality tester with high reliability is easy to operate.Specification:Condition: 100% Brand NewMaterial: ABSv\:* {behavior:url(#default#VML);}o\:* {behavior:url(#default#VML);}x\:* {behavior:url(#default#VML);}.shape {behavior:url(#default#VML);}Item TypeOnline PH EC TesterMeasurement RangePH: 0.00-14.00EC: 0-19.99mS/cmResolutionPH: 0.01EC: 0.01mS/cmAccuracypH: 0.1pHEC: 2% FSWorking Environment0-50; RH<95%Automatic Temperature Compensation0-50Power Supply (Built-in Lithium Battery 100mAh)Power AdapterProduct SizeApprox. 88 x 55 x 20 mm / 3.5 x 2.2 x 0.8 inWeightApprox. 501g / 17.7ozPackage List:1 x PH EC Online Tester1 x PH Probe1 x Small Screwdriver1 x Adapter1 x Hook2 x Bracket2 x Sticky Cap1 x PH Protective Cap1 x Instruction Manual