Feature: 1. LCD: 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. 2. Portable: The water tester is small in size, light in weight, which is convenient for users to operate and store, easy to carry. 3. Lock 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. 4. Pen Shape: The pen shape design makes the digital water quality tester is comfortable for users to hold, labor saving for users, convenient to store. 5. Wide Application: The digital EC tester is suitable for testing the purity of drinking water and can be used in swimming pool, aquarium, etc. Specification: Item Type: Pen Type EC Meter Material: ABS Weight: Approx. 105g/3.70oz Color: As Shown Scope: 0.00 to 19.99ms/cm Automatic 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). Package List: 1 x Pen Type EC Meter1 x Use Manual 1 x Screwdriver1 x Storage Box Note: A screwdriver is necessary to provide calibration