Ensure optimal water temperature for your aquatic pets with this advanced Mini Fish Tank Heater, featuring a precise PID computer control system for fast and energy-efficient heating. Constructed with durable quartz explosion-proof tube and copper wire heating elements, this 15W heater delivers rapid and safe temperature adjustments tailored for small tanks up to 4 liters. Key Features: · PID Computer Control System: Provides accurate temperature regulation to maintain a stable and comfortable environment for your fish and aquatic animals, reducing power consumption and enhancing safety. · Digital LED Display: Clearly shows both the set temperature and real-time water temperature with a high-accuracy temperature probe, allowing easy monitoring and adjustments. · Power Failure Memory Function: Automatically remembers the previously set temperature after power interruptions, ensuring uninterrupted heating without the need for manual resetting. · Over Temperature Protection: Features smart safety alerts—displays “HH” and stops heating if the water temperature exceeds 34℃, and issues a “LL” low temperature alarm below 15℃ to protect aquatic life. · Wide Application Range: Ideal for freshwater and saltwater fish tanks, turtle tanks, planted tanks, and other small aquatic environments with water volumes below 4 liters. Specifications: · Item Type: Mini Fish Tank Heater · Material: Quartz Tube, Plastic · Adjustable Temperature Range: 15-34℃ (59-93℉) · Power: 15W · Applicable Water Volume: Below 4L Package Includes: · 1 x Mini Fish Tank Heater This compact and efficient Mini Fish Tank Heater offers reliable temperature control and enhanced safety features, making it the perfect choice for small aquarium setups. With its durable construction and intelligent design, it ensures a healthy and stable habitat for your aquatic pets.