Automatic pH calibration – up to 5 points (NIST, USA pH buffers) / up to 6 points (DIN pH buffers)
0.01 pH resolution
Offset and average slope display 
Automatic / manual temperature compensation and temperature calibration function
ORP calibration option
Dissolved oxygen (DO) concentration in ppm (mg/L) and % saturation
0.01 mg/L or 0.1% DO resolution
Compensates salinity, temperature, and atmospheric pressure 
Up to 2 DO calibration points 
With real-time clock and date/time stamp for GLP compliance
Auto log data; built-in memory can store up to 1000 data
Auto shut-off (programmable: up to 30 minutes)
Auto stable, auto hold, and real time measurement modes
Calibration alarm (programmable: up to 90 days)
Built-in electrode holder allows 2 electrodes to be attached
Monochrome LCD with white LED backlight: 50 x 50 mm
Phono jack output for connecting the meter to computer via PC (USB) cable for data collection and software upgrade and to printer via printer (RS232) cable for printout 
Casing is IP67 waterproof/dustproof, shock & scratch resistant, non-slip
Powered by 2 x AA batteries
Packaged with electrodes and calibration solutions in carrying case