Feature: 1. High Accuracy: Using integrated optoelectronic sensor technology and multispectral mixed algorithm, the detection is stable and the accuracy is high. 2. 4 in 1: The digital water quality tester screen can display 4 kinds of measurement data: TOC, COD, TDS, temperature. 3. Convenient and Fast: Simple operation, easy to use, convenient and quick, just put the instrument probe into the water to measure. 4. Real Time Detection: The color status of the indicator light is detected in real time, and the water quality is judged according to multi parameter indicators. 5. Detection Object: Can be used to detect tap water, purified water, bottled water, groundwater, surfaces water (non sewage) and other domestic water. Specification: .Item Type: Digital Water Quality Meter Material: ABS Product Model: for WQM01H 3 Product Size: Approx. 165 x 19 x 21mm / 6.5 x 0.7 x 0.8in Test Samples: Tap Water, Bottled Water, Filtered Water, Groundwater, Surfaces Water (no Pollution) Detection Parameters: TOC COD: Range: 0-10mg/L, Resolution: 0.1mg/L, Repeatability: <±0.2mg/L, Accuracy: 10% F.S. TDS: Range: 0-1000ppm, Resolution: 1ppm, Repeatability: <±10ppm, Accuracy: 10%F.S. Temperature: Range: 0-80℃, Resolution: 0.1℃, Repeatability: <±0.2℃, Accuracy: ±0.5℃ Zero Drift: TOC/COD<0.5mg/L/day Power Supply: 2xAAA Batteries (delivered Without Batteries) Power Consumption: <10ua (standby) Working Temperature: 10-40℃ Storage Temperature: -10-70℃ Weight: Approx. 53g / 1.9oz Package List: 1 x Digital Water Quality Meter(Battery Not Included)1 x User Manual