Features 1、QUICK RESPONSE: The test pen features quick response, accurate measurement, sensitive operation. 2、EASY CARRYING: The tester is small in size and light in weight that you can easily take it with you to help with your work. 3、DATA LOCKABLE: The measuring data can be locked when the meter is in the water, which is convenient and easy for you to catch the most accurate data. 4、EASY TO OPERATE: The tester is easy to operate that it has clear button design, press them gently is OK! 5、APPLICABLE SCENARIOS: The tester is suitable for domestic water, swimming pool, aquaculture, environmental water, agricultural water, fish tank water, etc. Specification Item Type: TDS Tester Material: ABS Battery: 1.5V button battery CR2032 x 1 (without battery) Application: For domestic water, swimming pool, aquaculture, environmental water quality, agricultural water, fish tank water quality, greenhouse flowers, barreled water, community water station Basic Parameters: Test Range: 0 to 9990ppm Package List 1 x TDS Tester