Features: 1MAIN USE: The tester is mainly used for the detection of water quality in domestic water, aquaculture, swimming pool, etc. 2ACCURATE 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. 3AUTOMATIC BACKLIT: The backlit display will be turned on automatically after startup, and the value can also be seen clearly in dim conditions. 4SCOPE 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. 5EASY CARRYING: Comes with a small size and lightweight as well, you can easily store and carry the tester for convenient use. Package included: 1 x PH Tester 1 x Manual&nbsp 3 x PH Detection Reagent 1 x Plastic Box&nbsp