Product Description: Easy Auto Calibration with buffer recognition; Auto Temp. Compensation (ATC) ensures accuracy in variant temperatures (0-50.0°C). Accuracy: ±0.01 pH, 0.5°C, Range: -2.00 to 16.00 pH. Replacement probes PH60-E available. Auto. recognition of stable values (optional Auto HOLD function available) improves consistency so you don't have to guess when to manually hold measurement. Large clear screen with 3 backlit color (indicating 3 different modes), dual display of temp./pH, and reminders of completed calibrations and stable readings. Complete kit with ready-to-use calibration solutions, calibration bottles, storage solutions, AAA batteries, and a lanyard all in a premium portable carrying case. Specifications: pH Range -2.00 to 16.00 pH Resolution 0.01/0.1 pH Accuracy ±0.01 pH ±1 digit Calibration Points Automatic 1 to 3 points (recognizes 5 types: 7.00, 4.00, 10.01, 1.68, 12.46) Temperature Compensation Auto Temperature Compensation 0 to 50°C (32 to 122°F) ORP (mV) Range ±1000 mV Resolution 1 mV Accuracy ±0.2% F.S Temp. Range 0 to 50°C (32 to 122°F) Resolution 0.1°C Accuracy ±0.5°C LCD 3-Color Backlit LCD, 180° Viewing Angle Blue: Measurement Mode; Green: Calibration Mode; Red: Heads-Up Mode Reading Lock HOLD Stable Reading Indication Smiley Face icon Low-Battery Warning Battery icon flashing, reminder of battery replacement Self-Diagnosis Yes Heads-Up Function Yes Auto. Power-Off Yes, auto power-off in 8 minutes without operation Waterproof Rating IP67; Floatable Power DC3V, AAA batteries*4 Battery Life Continuous operation up to 2000 hours