Widely used to measure ORP/pH/RH/temperature/conductivity EC//TDS(PPM) of solution/water. Clear LCD display with backlight, which can display 3 results at the same time. Long-term online monitoring is possible. For the PH electrode, we use the BNC-Q9 plug, and the pH probe can be replaced. Before calibration, please turn off and fully charge. Only a mini screwdriver can easily calibrate pH and TDS. After charging the battery for 3 hours, it can work continuously for more than 10 hours in the event of a power outage or outdoors without a power source. The test temperature is in ℃ / ℉ (switchable unit). Automatic temperature compensation. integrated circuits and high cost performance. Each set of products has passed the calibration liquid test function before shipment. Used in water sources, aquariums, hydroponics, laboratories, spas, swimming pools and other water systems. Easy to use, and provide instant results. Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on. Voltage: AC100-240V Colour:As Shown Material:ABS Package Contents: 1 x 7 in 1 water quality monitor 1 x pH electrode 1 x temperature electrode 1 x adapter 2 x suction cups 1 x bracket 1 x mini screwdriver(random colors, don't accept the specified color) 1 x English manual 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.