QOXEZY USB Powered Submersible Aquarium Heater, 10W/5V/2A Adapter, Mini Fish Tank Heater 10W with Built-in Thermometer, External Temperature Controller, LED Display, Used for 0.5-1 Gallon Tank

​Features：
*USB low-voltage heating rod, dual-purpose for fish and turtle.
*MINI pocket-size design, suitable for use in occasions such as fighting fish tanks, mini tanks, turtle tanks, horned frogs, pet drinking water, etc.
*Externally controlled electronic temperature adjustment.
*The setting accuracy is 0.5°C or 1°F, and the display accuracy is 0.1°C.
*Main Features: Set the temperature to be arbitrarily set to 18-34 degrees Celsius; automatic constant temperature; Auto power off when the temperature is over 36°C

INSTRUCTIONS FOR USE
-When the power is on, insert the heating rod tube The water, the controller display shows 88.8, and then the display shows the last temperature.
After 3 seconds, the controller will display the currently detected water temperature.
-The temperature setting displays screen flashes and exits In temperature setting mode, the display shows the last set temperature Temperature value, short press once to increase by 0.5°C (US by 1°F), the temperature range becomes 18°C ~ 34°C cyclic sets, no button operation for 3 seconds Then automatically save the currently set temperature value.
-When the real-time water temperature is lower than the set temperature by 0.1℃, it will enter the temperature control state, and the green light will be on at this time.
-When the real-time water temperature is 0.5℃ lower than the set temperature, it will switch to the heating state and the red light will be on for heating.

Specifications:
*Power:10W
*Connector type: USB
*Voltage: DC 5V 2A
*Suitable for 1-3L fish tank(Not included adapter)

Package includes:
1 x USB heater
1 x manual
【Automatic Constant Temperature with 1℉ Accuracy】Thanks to advanced Intelligent Frequency Conversion Technology, the water temperature can be kept constant with an accuracy of 1℉. The heater’s working frequency will be changed according to temperature variation, and the heating is automatically stopped when the set temperature is reached. Compare to traditional heater, this new technology will cut down 49% electricity bill for you.
【Overheating Protection & DC 5V USB supply】The power will be cut off and stop heating automatically if the heater overheating. Protect your fish. Never cook your fish. USB 5V power supply, prevent electric shock.
【External Temperature Controller, Never Wet Your Hands】Use an external controller to set the temperature instead of immersing your hands in water to rotate the dial. Never wet your hands or contaminating your tank. Easy to install.
【Built-in Thermometer, Power-off Memory Function】Dual built-in temperature sensor, the water temperature will be displayed on the external temperature controller in real time. No need to buy other aquarium thermometer. The heater will remember the temperature setting, no need to reset the temperature after power off.