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 within&out elctrode probes.Highly efficient and acurate due to its advanced micoprocessor technology. Installs quickly and . Automatic Temperature Compensation:O°C-50°C Battery Type:4x1.5V(AG13) (Not included!!) Weight:98g Accuracy:±2%F.S Resolution:1mg/L(ppm) Measuring Range:0-1999mg/L(ppm) Colour:As Shown Material:Plastic Size:60x55x23mm Package Contents: 1 * TDS water quality analyzer 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. 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. Installs quickly and easily. Displays TDS levels of the feed water and product water within&out elctrode probes.Highly efficient and acurate due to its advanced micoprocessor technology. Wide screen display design.