1. ORP/PH controller, uses high-quality ABS material, , - and long service life. 2. Can measure PH/ORP, different water quality and ion oxidation degree, help remove harmful substances in surrounding water. 3. High measurement accuracy, quick response, stable data, suitable for aquarium, hydroponic plants, pools, and hot springs. 4. Set up real-time monitoring through WIFI networks, can use your mobile phone to check valid data status and water quality changes. 5. Adopts wall-mounted designed, convenient installation and operation, stable performance, and helps to detect water quality. Item Type: Water Quality Controller Measuring Range: PH: 0.0PH ORP: -1999-1999MV Resolution: PH: 0.01PH ORP: 1mv Accuracy: PH: ±(0.1%+0.02PH) ORP: ±5mv Set Control Range: PH: 3.5-10.50PH ORP: -500-500mv or 0-1000mv Voltage: AC230V±10%50/60Hz Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Material:ABS+electronic components colour:blue Voltage: AC220V Package Contents: 1 x Water Quality Controller 2 x Test Head 2 x Silicone Fixed Tool 1 x Accessory Kit 1 x 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.