Adjustable Water Flow: This aquarium pump comes with an adjustable knob, allowing you to easily adjust the flow rate. maximum. Flow rate: 3000L/H, H-Max. [20-30 decibels, noise reduction design] It adopts pure copper wire motor design, which is very energy-saving and provides a quiet and pollution-free environment. The sound when working is about 20-30 decibels, which is lower than 40 decibels, making you feel comfortable and not disturbing the outside world. 【Three Multifunctional Nozzles】 Equipped with three nozzles, one with a diameter of 1.3 cm, another with a diameter of 1.6 cm, and the remaining one with a diameter of 1.9 cm, providing different water flow effects. 【4 Powerful Suction Cups】 The bottom of the submersible water pump is equipped with four powerful suction cups, ideal for vertical and horizontal installation. 【Removable and Cleanable】 Removable without tools, easy to separate and easy to clean. Ideal for aquariums, tabletop fountains, water gardens, hydroponic