1. Pros: Wireless design, no probes and messy wires in the water, the accurate temperature sensor on the back2. Use: Built-in battery, stick the aquarium thermometer outside the glass container, below the water level, read the temperature3. Suitable for different types of water such as fresh water, sea water, and tap water4. It can monitor the living temperature of pet tanks such as fish tanks, turtle tanks, coral tanks, plating tanks, glass containers, etc.5. Note: The thermometer should be attached to the outer tank glass and below the water level, do not leave the thermometer in the water, it is not waterproof.Specification:Name: Aquarium Digital ThermometerMaterial: ABS+metalSize: about 43*43*12mmcolor:whitePacking List:1*Aquarium Digital Thermometer