Feature:1. Lattice backlight LCD display, clear and intuitive, easy to read data.2. Automatic temperature compensation, quick response time, stable and reliable work.3. High measurement accuracy, with the measurement range of 0‑199.9%/0‑16.50ml/g.4. Compact size, light and portable, easy to carry, bring much convenience for you.5. Suitable for aquaculture, swimming pool, drinking water, agricultural water, etc.Specification: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: 0-50°C/32-122°FResolution: 1%/0.01mlTemperature: 0.1°C/32.18°FAccuracy: ±1.5%F.STemperature: ±1℃, ±33.8℉Residual Current: Not More Than 0.15mg/LResponse Time: No More Than 15 SecondsTemperature Compensation: 0℃-50℃Working Temperature: 0℃-50℃Size: Approx. 207 x 32 x 36mm/8.1 x 1.3 x 1.4inPackage List:1 x Dissolved Oxygen Meter (Battery Not Included)1 x Manual2 Pack of Accessories (4pcs)Note:1. 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.