Feature 1WIDE COPE OF APPLICATION The digital water quality tester is widely used to measure PH/EC, which is very convenient. 2EASY TO READ The multi function tester has a clear LCD with backlight, which can be monitored online for a long time. 3USING RANGE Suitable for water sources, aquariums, hydroponics, laboratories, spas, swimming pools and other water systems. 4EASY TO USE The PH/EC tester can detect water quality for a long time and provide instant visualization of the results. 5RUGGED AND DURABLE Made of high quality ABS material, not easy to damage, long service life, and can be used for a long time with confidence.Item Type: Water Quality TesterMaterial: ABSWeight: Approx. 621g / 21.9ozProduct Size: Approx. 152x80x26mm / 6.0x3.1x1.0inScope:PH: 0.00~14.00pHRelative Humidity: 10%RH~99%RHEC: 0.00~19.99ECResolution:pH: 0.01pHRelative Humidity: 1%RHEC: 0.01ECAccuracy:PH: 0.1pHRelative Humidity: 5%RHEC: 2%F.SPower Supply: DC 6V (available power adapter)Battery: Ni-MH battery 110MAH (delivered with built in battery)Temperature Compensation: 0~50 .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 xWater Quality Tester1 x Probe1 x Adapter1 x Connection Line1 x Manual4 x AccessoriesNote1. The battery needs to be charged if the backlight becomes dim, the test error is too large, or the display is blurred.2. The device has a smart charging system, when the battery is full, it will automatically cut off.3. The recommended charging time is 23 hours.4. If you use it for a long time, please connect the power adapter.