Dependable Temperature Tracking: Delivers 5-second refresh rates across a range of -9.9 to 50 degrees Celsius, ensuring optimal aquarium environments through highly accurate sensor-based monitoring. USB-C Rechargeable Convenience: Featuring USB-C charging and a built-in 5V battery, this device provides seamless usage for up to 45 days per charge, assuring consistent water temperature monitoring without frequent recharging interruptions. Effortless Thermal Control: Auto-off after 30 seconds; instant single-touch temperature updates; hassle-free wireless performance and a tidy cordless finish suitable for all aquarium settings requiring practicality and elegance. All-Environment Visibility: Night view backlight ensures easy reading in any light with a clear LED display and large 2-inch digital screen for optimal aquarium temperature monitoring. Use scenarios: - Ideal for desktop or nano aquariums where precise temperature control and fast updates are needed for healthy fish and plants. - Suitable for quarantine or breeding tanks where stable temperature and long battery life minimize maintenance. - Great for rooms with variable lighting or night viewing, thanks to the night view backlight and readable display.