1. and convenient, it can be measured anytime and anywhere 2. Titanium alloy electrode, resistance, more accurate measurement 3. Three kinds of impurities in water can be detected to the health of drinking water 4. Simple operation, quick response, open the switch to measure immediately 5. Widely used in domestic water, breeding farms, swimming pools, laboratories, aquariums, food processing, etc. Measuring Range TDS: 0-9990ppm Accuracy: ±2% Size: 150mm x 17mm Battery: 1 x CR1225 battery(not include) Colour: White Material: ABS Package Contents: 2 x TDS Meter 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.