Features 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. Specifications Item Type: Dissolved Oxygen Meter Material: ABS Weight: Approx. 629g/22.2oz Battery: 2 x AAA Battery (Not Include) Technical Parameter: Measuring Range: 0-199.9%/0-16.50ml/g Temperature: 0-50°C/32-122°F Resolution: 1%/0.01ml Temperature: 0.1°C/32.18°F Accuracy: ±1.5%F.S Temperature: ±1℃, ±33.8℉ Residual Current: Not More Than 0.15mg/L Response Time: No More Than 15 Seconds Temperature Compensation: 0℃-50℃ Working Temperature: 0℃-50℃ Size: Approx. 207 x 32 x 36mm/8.1 x 1.3 x 1.4in Package List 1 x Dissolved Oxygen Meter (Battery Not Included) 1 x Manual 2 Pack of Accessories (4pcs)