Zuosheng Aquarium Heater,50w/100w/150w/200w/300w/500w Submersible Fish Tank Heater,External LED Controller, with Over-Temperature Protection and Automatic Power-Off When Leaving Water for. Submersible Aquarium Immersion Heater  (Pack of 1, black)

Mini Size & Wide Application 50W power fits 0-3.96 gallon tanks. Slim heating rod (5.35×0.68 in) is easy to conceal, paired with 70-inch long cable for flexible placement. Features safe heating and accurate temperature regulation. External LED Temperature Controller Real-time tank temperature display with ±0.5℉ precision. Adjustable temperature range: 59℉ to 93℉ for convenient monitoring and setting. Dual Overheat & Water Shortage Protection Auto shut off when overheating or the heater is exposed above water. Error codes will show on the controller to protect fish and aquatic creatures. Durable Premium Material Adopts nichrome heating wire and emery-filled quartz tube. Fast heat conduction, explosion-proof and corrosion-resistant, suitable for both freshwater and seawater tanks. Reliable After-Sales Support Stable and safe performance. Enjoy free return and exchange service for quality issues within 1 year. Professional support team is always available.