【Easy to control】The temperature can be adjusted between 20-34 °C (68-93 °F). Ensure that the fish have a warm and comfortable environment even in the cold winter. 【Safe and practical: Maximum submersible water depth of 120 cm working environment, this product is only suitable for freshwater and seawater. Double waterproof protection, fully submersible design, can accurately maintain the set temperature. 【High Performance】Sensitive temperature controller and overheat protection device, high-strength heating wire, uniform and stable heating, long service life, good heat transfer efficiency, with strong support hook and suction cup, make it more stable and reliable. 【With Suction Cup】With two strong rubber suction cups, strong suction, firmly fixed, not easy to fall off. 【High Quality】Explosion-proof quartz tube, reverse osmosis, anti-creeping, explosion-proof, durable. Double sealing head, safe, leak-proof.< /p>