Features:With highly efficient and accurate, the salinometer has measuring range of 0~199.9ppt and +/- 2%F.S accuracy.Lightweight and portable, its high precision LCD displays the measurement result clearly.The simple designed salinity meter is easy to operate, and measure your water quality within seconds.Easy to calibrate with the included small screwdriver.For measuring water quality in pools and aquariums, widely use in the industrial areas, agricultural production and marine aquaculture industry, etc.Specifications:Material: ABSRange: 0~199.9pptResolution: 0.1pptAccuracy: 2%F.SPower Supply: 4 * LR44 button battery (NOT included)Temperature Compensation: 0~50COperating Temperature: 0~50CItem Size: 165 * 50 * 28mm / 6.49 * 1.97 * 1.10inItem Weight: 56g / 1.97ozPackage Weight: 133g / 4.69ozPackage Size: 25 * 10.5 * 5cm / 9.84 * 4.13 * 1.97inPackage List:1 * Salinity Meter1 * Slotted Screwdriver1 * Manual (English) Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 466 hours, wish you a happy shopping!