Pay attention to whether the power supply and adapter voltage used in your country match, the product is wide voltage, and it is suitable for European and American power supply, but the adapter is not wide voltage. The adapter doesn't be made a wide voltage mainly considering product stability and resistance to strong magnetic fields. Customers are responsible for purchasing adapters for their own domestic use of different power sources. This is responsible for themselves and for the products. Widely used to measure the pH / Temperature / Conductivity EC / CF / TDS(PPM) of solution/water. Clear LCD with backlight, 3 results displayed simultaneously. Can online monitoring for a long time. PH electrode We use the international common BNC-Q9 plug，pH probe can be replaced. Before the calibration, please turn it off and fully charge. For calibration, please refer to the instruction manual. Easy calibration of pH and TDS with just a mini-screwdriver. Can work continuously for more than 10 hours of a power outage or outdoor without power after charging the battery for 3 hours. Test temperature in ℃ / ℉(switchable unit). Automatic temperature compensation. Imported IC and high-cost performance. FCC certificated to offer safer and precise measurements. Each set of products has passed the calibration liquid test function qualified before shipment. Apply in water sources, aquarium, hydroponics, laboratory, spas, swimming pools, and other water systems. Easy to use and provides an instant display of results.   The package includes:1 Multi-Function Water Quality Tester1 x pH electrode BNC type1 TDS electrode (connected to the host)1 rechargeable battery (installed1 USB type battery charger adapter (U.S., U.K., EU or Australia)1 mini screwdriver1 metal hook1 x user manual