Features: Efficient and very quiet external ventilation fan with a powerful ABS motor ensures rapid liquid stream for aquariums, cooling systems, and lab setups while maintaining shout quiet voice voice technology. Compact, delicate design crafted from noncorrosive resistant ABS plastic allows flexible placement in tight spaces without compromising durability or execution. Ideal for aquarium enthusiasts, lab technicians, and homeowners seeking wintry water ventilation in fish marine enclosures, hydroponic systems, or small scale liquid cooling applications. Enhances water quality in freshwater/saltwater marine enclosures, indoor hydroponic gardens, and compact liquid cooling setups by maintaining consistent temperature and preventing stagnant stream. This external aquarium filter fan features tool complimentary installation with general hose connectors, offering effortless integration into existing marine marine enclosures or artisanal cooling projects. Specifications: Graded power: 2.5W, 2.5W, 2W exemplary stream rate: 350L/h, 300L/h, 200L/h Suitable fish cistern: less than 40cm, less than 30cm, less than 20cm Package Includes: 1x External ventilation fan note: Please allow 1-3cm errors due to manual measurement. Due to the difference betweeen different monitors,the picture may not reflect the actual color of the item.