◎ Features ♣ Clear, Large LCD Display (4 1/8 X 3 1/16 In.). ♣ Clear LCD Displays D.O. As Percent Air Saturation Or D.O. As Parts Per Thousand, Simultaneously With Temperature. ♣ Manual Or Automatic Temperature Compensated (ATC) D.O. Readings. ♣ User Selectable Salinity And Pressure Compensated D.O. Readings. ♣ Works With ACcurate And Reliable Polarographic D.O. Probes. ♣ Convenient One Point Calibration For D.O. Calibration Data Is Stored In Memory And Is Ready For Use On Power Up. ♣ Automatic Lock Mode And End Point Sensing Are Available To Lock In Stable Readings. ♣ Intuitive Operation With Membrane Keypad With Tactile And Audio Feedback. ♣ Splash Resistant Case Is mAde With Durable, Reinforced Plastic For Added Protection. Protective Covers For Connectors Are Included. ♣ Large LCD Is Offset For Improved Protection Against Unintentional Damage. ♣ Smaller Case Does Not Clutter Valuable Desk Space. ♣ 8 Pin DIN Connector For D.O. And Thermistor. ♣ AC Adaptor Or Battery Power.