1、With a pen like appearance, it is simple and portable, and can be easily held for measurement in various situations. 2、Simple operation, you only need to put the meter into the solution, and it can respond quickly and stably to the reading. 3、With a calibration function, it can perform data calibration after the test to ensure high accuracy. 4、Multifunctional, it is mainly used to test TDS (ppm /), EC (uS / cm, mS / cm), SALT (%), S.G (sea water gravity) and TEMP (℃/℉). 5、Wide range of applications, it is suitable for agriculture, animal husbandry, aquarium and food brewing. Item Type: Water Quality Detector Model: C-100 Material: ABS Battery: 3x1.5V LR44 Battery (Battery Not Included) Application: It is suitable for agriculture, animal husbandry, aquatic products, and food brewing. EC Range: 0-10000uS/Cm, 10.01-19.99mS, 20.1-400mS/Cm EC Resolution: 1uS/Cm; 0.1mS/Cm EC Accuracy: ±2%F.S TDS Range: 0-1000ppm, 1001ppm-10000ppm, 10.1-200.0ppt (Automatically Out of Range) TDS Resolution: 1ppm; 0.1ppt TDS Accuracy: ±2%F.S Salinity Range: 0.01-25.00%, 0-10000ppm, 10.1-200ppt Salinity Resolution: 0.01% Salinity Accuracy: 0.01-5.00% (±0.1%) 5.10-25.00% (±1%) SG: 1.000-1.222 EC Calibration: Optional Three-Point Calibration (1413uS, 12.88mS, 111.8mS) Temperature Compensation: ATC Operating Environment: 0 To 80.0°C (32.0-176°F); <90% TDS Coefficient: 0.5 Temperature Range: 0.1-80.0℃, 32.0-176℉ Temperature Accuracy: ±0.5℃ Temperature Resolution: 0.1℃/℉ 1 x Water Quality Detector (Battery Not Included) 1 x Carrying Bag 1 x Manual