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 New Material: ABS v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} x\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} Item Type Online PH EC Tester Measurement Range PH: 0.00-14.00 EC: 0-19.99mS/cm Resolution PH: 0.01 EC: 0.01mS/cm Accuracy pH: ±0.1pH EC: ±2% F•S Working Environment 0℃-50℃; RH<95% Automatic Temperature Compensation 0℃-50℃ Power Supply (Built-in Lithium Battery 100mAh) Power Adapter Product Size Approx. 88 x 55 x 20 mm / 3.5 x 2.2 x 0.8 in Weight Approx. 501g / 17.7oz Package 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