General description An ideal tool to check the quality of your water, whether it is from a faucet, hot tub, home brewing, indoor soil culture, aquarium, hydroponics, or swimming pool. This digital pH meter is compact, lightweight, and easy to carry, making it perfect for on-the-go testing. Technical specifications pH range: 0.00 to 14.00 pH resolution: 0.01 pH Accuracy: ± 0.01 pH EC and TDS range: 0 to 9999 ppm Installation No tools required for calibration. Simply remove the protective cap and immerse the pH meter electrode into the solution. Usage Press "ON/OFF" to turn on the electronic pH meter. Stir gently and wait a few seconds until the reading stabilizes. Automatic calibration function for quick readings. Other information Includes: 1 pH tester, 3 calibration bags, 2 spare batteries, and instructions.