auomii USB Aquarium Heater,10/20/30W Adjustable Mini Fish Tank Heater, External Temperature Controller, LED Display, Used for 1-3 Gallon Tank

• Automatic constant temperature: Auomii aquarium heater is specially designed for mini fish tank for 0-1 gallon. The heating will be automatically stopped when the set temperature is reached
• External temperature controller: Set the temperature via an external controller instead of submerging the hands in water and turning the dial
• Easy to Install: Thanks to the ultra-compact heater with powerful suction cup, it can be easily installed anywhere in the tank
• Thermometer Inside: The water temperature will be displayed on the external controller in real time. No need another aquarium thermometer
• Overheating protection: Prevent cooking fish as overheating protection. Stop heating automatically when overheating or lack of water

Product description CAUTIONS: 1, The device must be used under rated voltage 100-130V. 2, The heater must be fully submersed into the water. The external temperature controller must be kept away from the water as it is not waterproof. 3, When there is moss or other dirty on the heater surface and the LED screen, it needs to be cleaned up with soft brush in time. 4, Disconnect power socket and wait for 15 minutes before changing water or remove heater. 5, Place the heater in the way of water flow and don't bury it. Products Highlight: 1, Small size. It's perfect for a mini fish tank 2, with strong suction cups, easy to install 3, Easy to set temperature. External temperature controller. 4, Easy to read. Built-in Thermometer. Dual built-in temperature sensor. LED display. 5, High accuracy up to 1℉ thanks to advanced Intelligent Frequency Conversion Technology. 6, Safety. Overheating protection / lack of water protection 7, Suitable for both saltwater and freshwater. 8, Plastic cover, scalding resistant and explosion resistant. Parameters: Voltage: 100~130V Power: 10W/20W/25W/30W/50W/100W/150W/200W/300W Aquarium Volume: *mini-10W: below 1 Gallon *mini-20W: below 2 Gallon *mini-30W: below 3 Gallon * 25W: 1-5 Gallons * 50W: 2-10 Gallons * 100W: 5~20 Gallons * 150W: 10-30 Gallons * 200W: 15-40 Gallons * 300W: 25-60 Gallons Temperature Range: 18~34 °C / 64~93 ℉ Temperature Accuracy: 0.5 °C / 1 ℉ How to switch temperature unite between C and F? Press and hold 'SET' button, power on the heater, and then release the button, the temperature unit will be changed between C and F. Directions The heater must be fully submersed into the water. The external temperature controller must be kept away from the water as it is not waterproof. Safety Warning Disconnect power socket and wait for 15 minutes before changing water or remove heater