[Wide Application]The ph tester digital is suitable for testing household drinking water, hydroponics, swimming pools, aquariums, laboratories, etc. Ponds and koi ponds, and can also detect the salinity of seawater, ocean and saltwater fish ponds. [Easy to operate and LCD display]Easy to operate, even beginners can use it with confidence. [High-Precision pH Tester]The high-precision algorithm chip and electrodes of the digital water quality meter ensure accurate and fast response,Satisfy most your testing requirements and fully test water quality! [ Easy to Use/Calibrate ]: Just dip the electrode into the target solution and wait a few seconds to get the test results [ Perfect for Hydroponic Gardens, Aquariums, and Fish Tanks ]: Optimize plant growth in hydroponic systems, ensure the well-being of aquatic life in aquariums, and maintain the ecological balance in fish tanks with regular water quality checks. The tester empowers enthusiasts and professionals alike to create optimal environments for plants and aquatic creatures.<br><br>Colour:Photo Color Material:plastic<br><br>Package Contents: 2 x Water quality test pen (backlit + non-backlit)<br><br>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.