This advanced Dissolved Oxygen Meter is crafted from plastic and is presented in the color as shown in the picture. It is designed to accurately measure oxygen concentration, dissolved oxygen saturation, and temperature in various aquatic environments. The package includes one dissolved oxygen meter, one electrode, one 30mL electrode filling solution, and six replaceable electrode heads, ensuring comprehensive readiness for immediate use. Features: Measuring Range: Oxygen Concentration (mg/L): 0-30mg/L Dissolved Oxygen Saturation (%): 0.0-300.0% Temperature: 0-40C Resolution: Oxygen Concentration (mg/L): 0.1 mg/L Dissolved Oxygen Saturation (%): 0.1% Temperature: 0.1C Accuracy: Oxygen Concentration (mg/L): 1.5% F.S Dissolved Oxygen Saturation (%): 1.5% F.S Temperature: 0.5C Calibration Mode: Supports single-point or dual-point automatic calibration (zero point or automatic 100% calibration in the air) Response Time: 45s (fast response at 20C) Temperature Compensation: ATC (0-40C) Battery Power: Includes low battery warning Color: As shown Material: ABS Package Contents: 1x dissolved quality detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.