High-Precision Temperature Sensor: Aquarium thermometer with built-in nickel-plated copper temperature sensor. Accurate and sensitive. Measurement range: 0°C to 60°C. Accuracy: 0.1°C. Error: ±0.5°C. Update frequency: 5 seconds. Quickly detects temperature changes and provides real-time monitoring. Easy to Use: This digital aquarium thermometer is simple and convenient to use. The back is equipped with 3M waterproof PVC adhesive. Simply remove the protective film and attach the thermometer to the outside of the aquarium, below the water surface. Without a probe or cumbersome wires, it provides a clean and healthy environment for your fish. High-Resolution LED Display: This aquarium thermometer features a large, bright, and easy-to-read LED display. Press the control button. After displaying the correct reading, the aquarium thermometer enters standby mode after 5 seconds and is easily reactivated by pressing the power button. This feature is more environmentally friendly and energy-efficient. Versatile Use: This aquarium thermometer is ideal for monitoring the temperature in your aquarium. It can also be used to measure the temperature in reptile terrariums, etc. It is suitable for freshwater, tap water, saltwater, and seawater, providing your pets with an optimal environment. Long Battery Life: Powered by a low-consumption 3V lithium-manganese battery and features an automatic standby mode that extends its lifespan up to 5 years. Compact and stylish, its casing is only 1 cm thick, making it easy to use. Note: This one-piece thermometer is designed for use outside of water. The battery is not removable. If you have any questions, please do not hesitate to contact us.