Description 1[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 060 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. Item Type: PH Tester Material: ABS Product 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: 0.00-14.00pH PH Resolution: 0.01PH Error: 0.05pH TDS Detection Range: 1-9990ppm TDS Resolution: 1ppm; 0.1ppt Error: 2%F.S ORP Detection Range: 0~1000mV ORP Resolution: 1mV Error: 2mV EC Detection Range: 0~19990us/cm EC Resolution: 1us/cm; 0.1mS/cm Error: 2%F.S Temperature Detection Range: 0-60/32-140 Temperature Resolution: 1/ Error: 0.5 Waterproof Rating: IP67 Working Environment: 0-60 (32-140); RH100% Automatic Shutdown Time: 5 minutes Weight: Approx. 165g / 5.8oz 1 x Water Quality Meter (Battery Not Included) 1 x Manual