Feature 1Lattice backlight LCD display, clear and intuitive, easy to read data. 2Automatic temperature compensation, quick response time, stable and reliable work. 3High measurement accuracy, with the measurement range of 0199.9%/016.50ml/g. 4Compact size, light and portable, easy to carry, bring much convenience for you. 5Suitable for aquaculture, swimming pool, drinking water, agricultural water, etc.Item Type: Dissolved Oxygen MeterMaterial: ABSWeight: Approx. 629g/22.2ozBattery: 2 x AAA Battery (Not Include)Technical Parameter:Measuring Range: 0-199.9%/0-16.50ml/gTemperature: 0-50C/32-122FResolution: 1%/0.01mlTemperature: 0.1C/32.18FAccuracy: 1.5%F.STemperature: 1, 33.8Residual Current: Not More Than 0.15mg/LResponse Time: No More Than 15 SecondsTemperature Compensation: 0-50Working Temperature: 0-50Size: Approx. 207 x 32 x 36mm/8.1 x 1.3 x 1.4in .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 x Dissolved Oxygen Meter(BatteryNot Included)1 x Manual2 Pack of Accessories (4pcs)Note1. Please allow 0‑2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.