Wide Range Monitoring Provides dependable temperature tracking across 9.9 to 50 degrees Celsius with a responsive 5second update interval. Powered by an advanced sensor chip for meticulous aquarium care, so you can rely on accurate readings without constant manual checks. LongLasting Battery Life Builtin 5V rechargeable battery with USBC charging supports dependable performance for up to 45 days on a single charge. This delivers convenient, uninterrupted monitoring for your tank environment and reduces frequent maintenance. UserFriendly Tool Autooff after 30 seconds promotes energy efficiency while enabling singletouch temperature checks for wireless and effortless usage in your aquarium setup. The cordless design offers a clean look that enhances the overall aesthetics of your tank space. LowLight Clarity Reads clearly in any lighting with a night view backlight, complemented by a clear LED display and a large 2inch digital screen for accurate temperature tracking at a glance. Use scenarios Daily freshwater or tropical tanks: Use this gauge to monitor temperature fluctuations caused by room conditions or heater cycling, with quick 5second updates for timely adjustments. Reef or coral tanks: Rely on precise temperature awareness in lowlight setups, where the night view backlight and large display help you read values without disturbing the tank. Remote or secondary tanks (quarantine or display tanks): Take advantage of cordless operation and up to 45 days of battery life between charges to minimize maintenance and keep monitoring uninterrupted.