Super Mini Size, 10Watt, below 1 Gallon YukiHalu 10W aquarium heater is designed for the mini fish tanks less than 1 gallon. Compact design, take less space in the fish tank, easy to hide in the tank. Temperature can be accurately adjusted from 64 to 93 F. The rated voltage DC 5V/2A. Important tips: insufficient power of the adapter will cause no heating and the number will flash or the controller restarts repeatedly, make sure the power adapter is 5V 2A and has enough power.
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. 30days full refund, 12-months .
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.

 
 
Product Description
 
 
 
 
 
 
 
 
 Automatic constant the water temperature. How it works? 
 
Press the 'SET' button to adjust the temperature. Press once, the temperature will increase 1°F, Press the button several times until the target value is reached. Temperature can be accurately adjusted from 64 to 93°F
No operation for 3 seconds, the setting is confirmed to be activated
The heater starts heating. Red indicator lights on
Stop heating automatically when the setting temperature reached. Green indicator lights on.
 Automatic constant temperature with 1℉ accuracy. The heater works in variable frequency mode based on PID control strategy
 
 
 
 
 
 
 
 
 
 
 
 
 
 CAUTIONS & SPECIFICATION 
 
If the number flashes or the controller restarts repeatedly, please replace a high-power adapter, make sure the power adapter is DC 5V=2A(10W). Insufficient power of the adapter will caused no heating and the number flashes.
Suction cup is not included.
 
 Parameters: 
 
Adapter: DC 5V / 2A /10W. Use enough power adapter is important.
Temperature Range: 18~34 °C / 64~93 ℉, Temperature Accuracy: 0.5 °C / 1 ℉ 
Power Cord length：4.2Ft
 
 Packing list: 1x heater with external controller, 1x User manual 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Never cook fish, Overheating protection 
 
H1: Overheating protection. The power will be cut off and stop heating automatically if the water temperature exceeds 95°F, Display 'H1' error code. The heater will re-work if the water temperature below 93°F. Protect your fish.
Other codes: Apply to replace a new kit.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Small size. Perfect for a mini fish tank 
 
Compact design, Small size heater
Take less space in the fish tank
Easy to hide in the tank
Fit for mini aquarium tanks
 
 
 
 
 
 External temperature controller 
 
Easy to set temperature. Never Wet Your Hands
Easy to read. Digital LED display
Built-in Thermometer. Dual built-in temperature sensor
Intelligent Indicator Light. Green: no heating / Red: heating
 
 
 
 
 
 1℉ accuracy with smart memory function 
 
Automatic constant temperature with 1℉ accuracy as Intelligent Frequency Conversion Technology
The heater will remember the temperature setting, no need to reset the temperature after power off
 
 
 
 
 
 
 
 
 
 
 
 
 TROUBLE SHOOTING 
 
 1, The number flashes or the controller restarts repeatedly 
 
Insufficient power of the adapter. Please replace a high-power adapter.
 
 2, No heating 
 
Insufficient power of the adapter. Please replace a high-power adapter.
The heater power is not enough, please replace the high-power heater.
 
 3, Water temperature cannot rise 
 
Set the target temperature correctly and choose the right power heater according the aquarium volume.
If the ambient temperature is very low, you need to choose a more powerful heater or use 2 heaters.
 
 4, The number decrease during heating 
 
If the water temperature is lower than the ambient temperature, the number will decrease when the heater is just put in the water. Please wait a few hours, the temperature will increase slowly as the power of the heater is too small.
 
 5, How to change the temperature unit 
 
Press and hold 'SET' button, power on the heater, and then release the button, the temperature unit will be changed between C and F.