: 1. The compact design takes up less space in the fish tank. 2. The heating will stop automatically when the set temperature is reached. 3. Easy to install. The water temperature will be displayed on the controller in real-time. Usage Way: 1. Press the "SET" button to adjust the temperature. Press once, and the temperature will increase by 1 ° F, press the button several times until the target value is reached. The temperature can be precisely adjusted from 64 to 93 ° F, 2. No for 3 seconds, setting confirmation is active 3. The heater starts heating: the red indicator light is on. 4. Automatically stop heating when the set temperature is reached. The green indicator light is on. 5. Automatic constant temperature with an accuracy of 1 ° F. The heater operates by frequency conversion based on the PID control strategy. Specifications: Name: Aquarium Heater Adapter: DC 5V/2A/10W. It is important to use adequate power adapters. Temperature range: 18 34 ° C/64 93 ° F Temperature accuracy: 0.5 ° C/1 ° F Length of power : 4.2Ft/1.28m Size: (approx.)15*7.8*5cm/5.91*3.07*1.97inch Packing List: 1 * aquarium heater 1 * Support

? [ Comprehensive Application ] Suitable for fish tanks, aquarium tanks, turtle bs, pet drinking fountains, and other occasions, Small Aquarium Heater is high-temperature resistant and durable, and can effectively protect the fish from scalding. ?[ External Temperature Controller ] Aquarium Heaters can show the current water temperature, the temperature can be precisely adjusted from 64 to 93 F, designed with an LED digital display screen. ? [ Overheating Protection Function ] Protects your fish or aquatic pets, Submersible Aquarium Heater is easy to install and use, if the heater overheats, the power will be cut off automatically. ? [ Power Off Memory Function ] Features a double built-in temperature sensor design, Fish Tank Heater will keep the temperature settings until it powers on again, and the water temperature will be displayed on the external temperature controller in real-time. ? [ Automatic Constant Temperature ] Keeping the water temperature constant, the operating frequency of Aquarium Heater will vary depending on the temperature, and can stop heating automatically when the set temperature is reached.