Feature 1LCD: Equipped with large and clear liquid crystal display, readings of the water quality tester is easy to read and the EC meter has accurate measurement results. 2Portable: The water tester is small in size, light in weight, which is convenient for users to operate and store, easy to carry. 3Lock Function: The pen type EC meter is equipped with lock function, which is easy to see results and record, when you press the button, and then take it out from testing solvent. 4Pen Shape: The pen shape design makes the digital water quality tester is comfortable for users to hold, labor saving for users, convenient to store. 5Wide Application: The digital EC tester is suitable for testing the purity of drinking water and can be used in swimming pool, aquarium, etc.Item Type: Pen Type EC MeterMaterial: ABSWeight: Approx. 105g/3.70ozColor: As ShownScope: 0.00 to 19.99ms/cmAutomatic Temperature Compensation (ATC) : 0 to 50 Degree Centigrade (32 to 122 Degree Fahrenheit)Operating Temperature: 0 to 50 Degree Centigrade (32 to 122 Degree Fahrenheit)Battery: 2x CR1632 3V 120mah Battery (Delivered with Built In Battery) .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Pen Type EC Meter1 x Use Manual1 x Screwdriver1 x Storage BoxNoteA screwdriver is necessary to provide calibration