... : 5 °C ~ 40 °CPH value: 4.0-9.7 First: Structural advantages1. 7 +3 gears sophisticated life choices2. Four plates and five ... .3. Keep PH value of water bettween 4.0-9.7, exquisite regulation according to demand4. Small current closed-loop type ... strong large-capacity electrolysis 6. Automatic tips for filter replacement 7. Touch button, , LED, LCD sound and light controlling , color tips8 ...