The AQQA Submersible Aquarium Heater is a high-quality, durable heater that is perfect for keeping your fish tank warm. Made of 2MM thick high-quality quartz, this heater is built to last. The double-sealing design prevents leakage, making it safe for use in both freshwater and saltwater environments. The intelligent temp control range allows you to set the perfect temperature for your fish tank. With a detachable Type-C cable, it is easy to set up and store.