- Accurate Temperature Monitoring: This aquarium temperature gauge measures from -9.9 to 50 degrees Celsius and provides updates every 5 seconds, ensuring precise water temperature control for your aquatic environment with a high-accuracy sensor chip. - Extended Battery Life: Featuring a built-in 5V rechargeable battery with USB-C charging, this device delivers reliable monitoring for up to 45 days on a single charge, allowing you to focus on your aquarium without interruptions. - Easy to Use: The auto-off feature activates after 30 seconds to conserve energy, and a single-touch design allows for quick temperature checks. Its cordless design enhances the aesthetic of your aquarium while providing hassle-free operation. - Enhanced Visibility at Night: With a night view backlight and a clear LED display, this gauge ensures easy readability in various lighting conditions, thanks to its large 2-inch digital screen for reliable temperature monitoring. Ideal for any aquarium enthusiast, this temperature gauge fits seamlessly into both freshwater and saltwater tanks, providing essential data for maintaining optimal fish health. Whether you're monitoring your tank after a water change or ensuring the right conditions for breeding, this device is an invaluable tool. Its user-centric design makes it perfect for both novice and experienced aquarists who seek precision and convenience.