Measures 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 
Allows up to 2 calibration points using galvanic DO electrode
°C & °F temperature readings
Auto log data; built-in memory can store up to 500 data
Auto stable, auto hold, and real-time measurement modes
Auto shut-off (programmable: up to 30 minutes)
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 (for software upgrade only)
Casing is IP67 waterproof/dustproof, shock & scratch resistant, non-slip
Powered by 2 x AA batteries
Packaged with galvanic electrode in carrying case