1 x 5 in 1 tds meter(LR44 battery include, replaceable), 3 x calibration powder.<br> More precise accuracy design and larger testing range than others to your drinking water is healthy. 0.01 accuracy; 0-14PH, 0~200000ppm tds, 0-200000us/cm ec, 0.01%-25% 0-1000ppm salt measure range of the digital ph meter you get a accurate testing result.<br> TDS meter is designed with 5-in-1 function, which can be measured PH, TDS, EC, SALITY, and TEMPERATURE of water. Fulfill all your testing requirements - fully test water quality<br> Get Healthy Pure drinking water or other use water with this 5 in 1 tds meter.<br> The tester has been calibrated at the factory before shipment, no need to re-calibrate, it is ready to use right out of . Just dip the probe of the PH tester into the liquid to start the test PH, TDS, EC, SALITY, and TEMPERATURE.<br> Easy to carry & use. Everyone could use this pocket size small but professional tds tester device to measure your drinking water, pool, fish tank, garden water and etc. And pH meter features a green Backlight LCD to help you see the measurement clearly in any situation.<br> No need to pay attention to the temperature of testing liquid, ppm meter can accurately determine the PH, TDS, EC, SALITY value of the sample in the temperature range of 0 C-60 C (32F-140F), so as to solve the inaccurate problem caused by changing the liquid temperature.<br> Material: metal + plastic<br> Color as shown<br> Package Contents:<br> 1 x Water Quality Tester<br> 3 x calibration pack<br> Only the above package content, other products are not included.<br> 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.