Features1[Probe Detachable Design] Probe plug in design, which can removable and replaceable to prevent accidental damage to the probe. 2[Multifunctional] Water quality meter can test PH, TDS, EC, ORP, temperature to meet various needs in your daily life. 3[Temperature Compensation Function] Temperature will have a certain influence on PH measurement, with 0?60 automatic temperature compensation, the higher the accuracy, the greater the influence. 4[Automatic Shutdown] With backlight function, automatic power off after five minutes of non use, power saving, so you can use it with confidence. 5[IP67 Waterproof] Made of ABS material, IP67 waterproof, which is high accuracy, durable, safe and reliable, and can be used for a long time.SpecificationItem Type: PH TesterMaterial: ABSProduct Size: Approx. 183 x 37 mm / 7.2 x 1.5 in (with backlight)Battery: 3 x LR44 batteries (Battery Not Included)PH Detection Range: 0.00-14.00pHPH Resolution: 0.01PHError: 0.05pHTDS Detection Range: 1-9990ppmTDS Resolution: 1ppm; 0.1pptError: 2%F.SORP Detection Range: 0~1000mVORP Resolution: 1mVError: 2mVEC Detection Range: 0~19990us/cmEC Resolution: 1us/cm; 0.1mS/cmError: 2%F.STemperature Detection Range: 0-60/32-140Temperature Resolution: 1/Error: 0.5Waterproof Rating: IP67Working Environment: 0-60 (32-140); RH100%Automatic Shutdown Time: 5 minutesWeight: Approx. 165g / 5.8ozPackage List1 x Water Quality Meter (Battery Not Included) 1 x Manual