Feature: 1. AUTOMATIC THERMOSTAT: Mini aquarium heater adopts PID computer control system, copper wire heating, quartz explosion proof tube, fast heating speed, power saving and safety. 2. DIGITAL DISPLAY: Mini fish tank heater has LED display to show the set temperature and real time water temperature, with high accuracy temperature probe, high temperature protection. 3. MEMORY FUNCTION: Aquarium heating rod has a power failure memory function, restart after power failure, the product will automatically remember the set temperature at the last shutdown. 4. WIDE APPLICATION: Submersible aquarium heater can be used in a wide range of freshwater and saltwater fish tanks, turtle tanks, grass tanks and other small tanks and low water turtle tanks. 5. USB POWER SUPPLY: Fish tank heating rod is designed with USB power supply, it can be connected to rechargeable battery, computer USB, car charger, USB power supply. Specification: Item Type: Mini Aquarium Heater Material: Quartz Tube, Plastic Use: Fish Tank Mini Heating Rod Adjustable Range: Celsius: 15‑34℃ Fahrenheit: 59‑9℉ Applicable Water Volume: Below 3L Power: 10W Over temperature protection technology: when the water temperature is lower than the set temperature 0.1 ℃ into the temperature control state, the water temperature exceeds 36 ℃ display HH, the indicator light is on yellow, until the temperature back to 34 ℃ or less, resume normal work. When the heating rod is working, the red light is on, when the heating rod leaves the water surface, the LED screen will show L1 and keep flashing to remind, while the heating rod will power off and stop heating.. Package List: 1 x Heating Rod1 x Plug Adapter1 x Suction Cup Note: