1、Filter sponge makes water clean ,removes odors; waterfall running increases the content of oxygen in the water. 2、With double layer filter cotton, you can add other filter material according to feed density and type. 3、Suitable for water level 2.5-10cm, the hook and suction cups can adjust easily to high or low base according to water level. 4、Made of high-quality, sturdy plastic, non-toxic, safe for you and your fish. Ultra quiet running provides your pets with comfortable habitats. 5、Designed for use in small fish and turtle tank ,really not for big fish tank. Features: Filter sponge makes water clean, removes odors; waterfall running increases the content of oxygen in the water. With double-layer filter cotton, you can add other filter material according to feed density and type. Suitable for water level 2.5-10cm, the hook and suction cups can adjust easily to the high or low base according to water level. Made of high-quality, sturdy plastic, non-toxic, safe for you and your fish. Ultra-quiet running provides your pets with comfortable habitats. Designed for use in small fish and turtle tank, really not for big fish tank. Specifications: Item name: Internal aquarium filter Material: Plastic Color: White Voltage: 220V-240V (EU); 110V-120V (US) Power: 3W Flux: 200L/H Head: 0.6 M Package information: Package weight: 260g Package size: 18*10*6cm Package list: 1*Internal aquarium filter 1*Internal aquarium filter