Wide screen display design.You can connect with the water pipe, measuring influent and effluent two parameters can be wall-mounted or embedded,easy installation, operation and maintenance.Measure the tap water in vs. The purified water going out of your water filration system at any time.Displays TDS levels of the feed water and product water withinandout elctrode probes.Highly efficient and acurate due to its advanced micoprocessor technology.Installs quickly and .Automatic Temperature Compensation:OC-50CBattery Type:4x1.5V(AG13) (Not included!!)Weight:98g Accuracy:2 percent F.SResolution:1mg or L(ppm)Measuring Range:0-1999mg or L(ppm)Colour:As ShownMaterial:PlasticSize:60x55x23mmPackage Contents:1 x TDS water quality analyzerOnly 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.