Features 1、ENSURE ACCURACY: This water quality tester can provide accurate water or nutrient readings, maintaining EC, TDS, SALT, and S.G accuracy, meet any planting needs. 2、HELPS PLANT GROWTH: This water tester closely monitors values, allowing you to adjust the value in the hydroponic nutrient solution at any time to help plant growth. 3、BLUETOOTH FUNCTION: Our water tester features Bluetooth function, compatible with for IOS and for Android phones, which can transmit real time data within a distance of 10 meters. 4、MULTI PURPOSE: This digital water tester is suitable for water system, greenhouse reservoirs, DWC, hydroponics, drinking water, and well water. 5、PORTABLE SIZE: The lightweight and portable size allows you to easily carry this water detector in your pocket and take measurements anywhere. Specification Item Type: Water Quality Tester Material: ABS Battery: LR44 x 4 (shipped without battery) EC: 0-19900us/cm, 0-199.0ms/cm TDS: 0-19900ppm, 0-199.0ppt SALT: 0-199.0ppt, 0%-20% S.G: 0.990-1.400 Temp: 0℃-50℃ (32℉-122℉) Package List 1 x Water Quality Tester 1 x Instruction Manual 1 x Storage Box