Features Easy Operation This salinity test pen is very easy to use and operate, there is no complicated operation process. High Accuracy This salinity test pen provides stable performance and high precision result, the screen is easy to read. Wide Application This salinity test pen is suitable for drinking water monitoring, sewage, laboratory, agriculture, aquaculture and aquarium, hydroponics, etc. Portable Size This salinity test pen is small and lightweight, easy to carry and suitable for different occasions. HIGHLY DURABLE This salinity test pen is made of high quality ABS material, which is sturdy and very durable. Specification: Item Type: Salinity Tester Material: ABS Model: OW-98305. Battery: LR44 x 4 (battery not included). Usage: tap water, household water purifier, commercial water purifier, industrial water treatment industry, etc. Basic parameters: Perimeter: 0~199.9ppt Resolution: 0.1ppt Accuracy: ±2% F.S. Package list: 1 x Salt Tester 1 x screwdriver. 1 x user manual (English language not guaranteed). 1 x plastic box. Package List 1 x Salinity Tester 1 x Screw Driver 1 x User Manual 1 x Plastic Box