PH/mV/Temperature Kit pH Range -2.00 to 19.99 ORP Range -1999 to 1999mV Waterproof Yes Automatic Temperature Compensation Yes Displayed Temperature Range 0 Degrees to 100 Degrees C 32 to 212 Degrees F Operating Temp Range (F) 32 Degrees to 212 Degrees F Display Dual Backlit LCD Auto Power Off Yes Memory 200 Readings Temperature Compensation Range 32 Degrees to 212 F Calibration 3 point Power Source (2) AA Batteries