Feature: 1. MAIN USE: The tester is mainly used for the detection of water quality in domestic water, aquaculture, swimming pool, etc. 2. ACCURATE MEASUREMENT: The tester is equipped with an alloy probe and sensitive glass electrode. And it can achieve automatic temperature compensation to make result more accurate, reduce error. 3. AUTOMATIC BACKLIT: The backlit display will be turned on automatically after startup, and the value can also be seen clearly in dim conditions. 4. SCOPE OF USE: The tester can be used for domestic water, swimming pool, aquaculture, environmental water quality, agricultural water, fish tank water quality, greenhouse, barreled water, community water station, etc. 5. EASY CARRYING: Comes with a small size and lightweight as well, you can easily store and carry the tester for convenient use. Specification: Item Type: PH Tester Material: ABS Battery: 1.5V LR44 button battery x 2 (without battery) Scope of Use: Domestic water, swimming pool, aquaculture, environmental water quality, agricultural water, fish tank water quality, greenhouse flowers, barreled water, community water station Basic Parameters: Detection Range: 0 to 14ph. Package List: 1 x PH Tester1 x Manual 3 x PH Detection Reagent1 x Plastic Box