Kelkay F4640 is a plug-in fountain pump designed for use in fountains and other water features. It features an adjustable flow rate, allowing you to customize the water flow to your liking. The pump is easy to install and maintain, and it comes with a range of accessories to help you get started. With its durable construction and reliable performance, the Kelkay F4640 is a great choice for anyone looking to add a touch of beauty and tranquility to their home or garden.