1、Water Quality Testing: W218 water quality meter is a 24 hour online monitoring tool. The app is compatible with for IOS and for Android systems. Switch the mobile language and region, and automatically convert different words on the APP. 2、Online Wireless Remote Monitoring: The 8 in 1 water quality detector is used for online wireless remote monitoring, real time data receiving, and data is automatically stored and saved 30 days later. 3、Wireless WIFI APP Function: Wireless WIFI remote monitoring, connect mobile APP, multi parameter test, automatic correction, automatic data storage, save data for 30 days. 4、Wide Applications: Water quality tester is widely used in aquarium, glass fish pond, mining, medical research, agriculture, laboratory, water environment, quality control and other fields. 5、Real Time Data Detection: Click pH to view the details, and view the date [one day], week [one week], and month [one month]. Item Type: Water Quality Detector Material: ABS Color: As Pictures Shown Weight: Approx. 745g / 26.3oz Range: pH: 0.00-14.00pH ORP: -2000mv ~ +2000mv EC: 0-19000us/cm 0-199.0 ms/cm CF: 0-1999.0CF TDS: 0-19990ppm 0-199.0ppt Salt: 0-199.9ppt 0%-20% S.G: 0.990-1.400 Temperature: 0-50°C (32°F~122°F) Resolution: pH: 0.01PH, ORP: 1mv EC: 1us/cm(<1999us/cm) 10us/cm (>1999us/cm) 0.1ms/cm CF: 1CF TDS: 1 ppm (<1999ppm) 10 ppm(>1999ppm) 0.1 percentage point Salt: 1ppm (<1999ppm) 10 ppm（>1999ppm） 0.1 percentage point 0.01% S.G: 0.001 Temperature: 0.1°C (0.2°F) Accuracy: pH:±0.03pH ORP: ±5mv EC, CF, TDS, SALT: ±2%F.S Temperature: ±1.0°C Battery: DC 6V Temperature Compensation: 0°C-50°C Operating Temperature: 0°C-50°C Product size: Approx. 152x80x26mm / 6.0x3.1x1.0in Application: Aquariums, Glass Fish Pond, Mining, Medical Research, Agriculture, Laboratories, Water Environment, Quality Control and Other Fields 1 x Water Quality Detector 1 x Plug 2 x Electrode 1 x Connecting Wire 1 x Support 2 x Suction Cup 1 x Manual