The 4 in 1 water quality tester with pen-style design is lightweight and portable, so you can easily carry it in your pocket whether you're at the pool, on a trip, at the beach or camping. is easy to use, just dip the tester electrode in the solution and wait a few seconds to get the data on the LCD screen. The is designed with precision electrodes for precise measurements and a wide measuring range of 0°C to 80°C (32°F to 176°F). Automatic temperature compensation ensures accurate measurements at all temperatures and can perfectly resolve errors due to changes in solution temperature, resulting in more accurate readings. Suitable for a wide range of domestic water applications , aquariums, aquaculture, catering and food industries, fishing and swimming pools. The 4 in 1 water quality tester with pen-style design is lightweight and portable, so you can easily carry it in your pocket whether you're at the pool, traveling, at the beach or camping. is easy to use, just dip the tester electrode in the solution and wait a few seconds to get the data on the LCD screen. The is designed with precision electrodes for precise measurements and a wide measuring range from 0°C to 80 °C (32°F to 176°F). Automatic temperature compensation ensures accurate measurements at all temperatures and can perfectly resolve errors due to changes in solution temperature, allowing more accurate readings. Suitable for a wide range of applications in domestic water, aquariums, aquaculture, catering and food industries, fishing and swimming pools.