5W USB Aquarium Heater Stick, with Robust Safety Design,15 34C, Automatic Temperature Control, Heater, designed for small aquariums saltwater and freshwater

Intelligent shutdown: The temperature setting range is 17°C to 34°C (62°F to 93°F), and the heating cycle is gradual. After reaching the set temperature, the heating stops automatically and the temperature remains constant. Precise temperature control: The intelligent external temperature controller with electronic digital display precisely regulates the temperature to about 0.5 °C. External Temperature Controller, Never Get Your Hands Wet: Use an external controller to adjust the temperature instead of immersing your hands in water to turn the controller. Compact Size: With a length of only 90mm, this USB aquarium heater is tailored for tanks with a capacity of about 5L or less, perfect for small fish. Quick heating capability: Heats the water quickly to the desired temperature within an hour so that your pets quickly enjoy comfortable living conditions.