<p>Quick and Accurate Readings, - Just turn it on, immerse in about 1 inch of water and read the display, the large digital display makes it easy to read.</p> <p>Automatic calibration, no need for any adjustment screwdriver, it only takes 1-3 seconds to complete the automatic calibration calibration, measure the total dissolved solids (tds) in the water, know exactly when to replace the water filter.</p> <p>The handheld and compact carrying case makes it easy to put in your pocket or bag and take it with you.</p> <p>Perfect for home and laboratory TDS testing applications including drinking water, swimming pools, aquariums, hydroponics and more.</p> <p>No need any adjustment screwdrivers, just finish the calibration with Auto calibration with 1-3 seconds, Measure total dissolved solids in water(tds), Know exactly when to change water filters.</p> <p>Range: 0~9990ppm</p> <p>Accuracy: +\/-2%</p> <p>Battery: 2 x 1.5V LR44 Button Cell Batteries (included)</p> <p>Size: . 5.51 x 0.79 x 0.6 inch</p> <p>Colour:Navy blue</p> <p>Material:plastic</p> <p>Size:about 13.9 x 2.3 x 1.4cm</p> <p>Package Contents:</p> <p>1 x TDS Meter</p> <p>Only the above package content, other products are not included.</p> <p>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.</p>