Large high-definition LCD display with clear values and easy reading of records The three-way interface is equipped with two three-way joints, making it convenient and practical to detect water inlet and outlet. High-precision probes for inlet/outlet probes detect the quality of incoming and outgoing water respectively. Can be wall-mounted and installed. The back wall-mounted design can fix the detector and make it easy to install and remove. It is practical and convenient. Product Name: Water Quality Tester Model: DM-1 (without tee) Measuring range: 0.00-9990PPM, automatic *10 above 999PPM Resolution: 1PPM (0-999PPM); 10PPM (1000-9990PPM) Accuracy: ±2% Power supply: 2*1.5V (button battery)/2*AA battery Rear installation: with Nylon Sticker / with hanging plate Note: The color of the tee is random, don't accept the specified color Tips: The product may be updated constantly, the label words on the product are random, Cannot be chosen the specific words. The actual product may have slight differences or color differences. Colour:blue Material:plastic Package Contents: 1 x Water Quality Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.