- Accurate Temperature Readings: measurement span -9.9 to 50 C with updates every 5 seconds. A high-accuracy sensor chip maintains precise water temperature control in your aquarium environment. - Extended Use Capability: rechargeable 5V battery with USB-C charging. Operates continuously for up to 45 days on a charge for reliable aquarium temperature monitoring. - Smart Energy Saver: auto powers off within 30 seconds. Quick single-touch thermal readings with wireless operation and a cordless, unobtrusive design. - Optimal Low-Light Clarity: night view backlight, clear LED display, and a large 2-inch digital screen for easy temperature tracking in any lighting. - Use scenarios: - Regular monitoring of freshwater or saltwater tanks to prevent temperature swings that can stress inhabitants. - Tanks located away from outlets or during maintenance when a cordless setup is advantageous. - Readings at night or in dim rooms thanks to the backlight for unobtrusive, easy viewing.