Feature: 1. PID COMPUTER CONTROL SYSTEM: Adjustable aquarium heater adopts PID computer control system, copper wire heating, quartz explosion proof tube, fast heating speed, power saving and safety. 2. DIGITAL LED DISPLAY: Mini fish tank heater adopts LED display to show the set temperature and real time water temperature, with high accuracy temperature probe, high temperature protection. 3. POWER FAILURE MEMORY FUNCTION: Mini aquarium heater has power off memory function, restart after power off, the product will automatically remember the set temperature at the last power off. 4. OVER TEMPERATURE PROTECTION: When the water temperature exceeds 34℃, the screen will display HH and flash to remind and stop heating, when the water temperature is lower than 15℃, it will prompt LL, low temperature alarm. 5. WIDE RANGE OF APPLICATION: 15W aquarium heater is widely used, can be used in freshwater, saltwater fish tank, turtle tank, grass tank and other kinds of small tanks and low water turtle tank. Specification: Item Type: Mini Fish Tank Heater Material: Quartz Tube, Plastic Use: Fish Tank Mini Heating Rod Voltage: 100-240V Adjustable Range: Celsius: 15-34℃ Fahrenheit: 59-9℉ Applicable Water Volume: Below 4L Power: 15W. Package List: 1 x Mini Fish Tank Heater1 x Plug Adapter1 x Suction Cup