The ph probe can be easily removed and replaced with a screw connection For particularly good readability, the LCD display has a white backlight, which is activated automatically when the device is switched on On the top side there is not only the on and off switch but also two potentiometers for calibration at ph 7 or ph 4 values, for which the corresponding calibration solutions are included Clearly readable LCD display (max. 1999) with white backlight High measurement resolution of 0.01 ph