Features: 1. Oxygen and Temperature: This dissolved oxygen meter can be used to measure dissolved oxygen and temperature. Inbuilt microcomputer processor calculates and compensates all dissolved oxygen and temperature related measurement data. 2. Detachable Probe: This dissolved oxygen sensor adopts detachable probe, easy to replace, equipped with 6 probe protective covers. 3. Digital Screen Display: This dissolved oxygen tester adopts digital screen display, which is clearer and more convenient to read the data. Support auto power off in 8 minutes if not using it. 4. Temperature Compensation: Oxygen solubility will be affected by temperature, atmospheric pressure, and salinity. Our instrument with temperature compensation can meet normal use. 5. Wide Application: This dissolved oxygen meter is widely used in aquariums, swimming pools, pond, freshwater aquaculture, Marine aquaculture, school teaching experiment, laboratory sterile environment, aquaculture, scientific research and other fields Features Waterproof Ear Plugs: Prevent water from entering the ears of swimmers and bathers, providing a secure and comfortable swimming experience. Unique Shape Design: Form-fitting design that easily conforms to the ear canal, ensuring a snug fit and effortless wearability. Soft Silicone Material: Made from non-toxic, anti-allergic, and odorless silicone, ensuring safety and comfort for prolonged use. Reusable and Washable: Can be washed and reused, making it suitable for long-term use, while also being environmentally friendly. Superior Noise Reduction: Boasts advanced noise reduction technology, making it ideal for swimming, showering, and sleeping, offering a peaceful and undisturbed experience.