4. Battery and automatic function error prevention system (BEPS) can extend battery life and prevent false readings. 1. 4‑digit LCD switch display, can measure PH, temperature, ORP value of a water at the same time. 3. Complete functions, high accuracy, with microprocessor‑based meters, which can improve speed and accuracy. 2. Portable multifunctional water quality meter, suitable for swimming pool, breeding, laboratory, etc. 5. Use three memory buffers for automatic calibration, easy to use. , portable and compact, easy to carry., Manufacturer: Akfldms