The EHEIM professional 5e outdoor filter is our best outdoor filter. It offers everything an aquarist could want. It can be individually programmed and controlled wirelessly. The electronics control all functions and keep the flow constant. In addition, it offers you high performance and a large filtration volume. Thanks to the intelligent design and the electronic flow control, the cleaning intervals of the biological and mechanical filter materials are considerably extended. In addition to this, the traditional quality of EHEIM external filters is ensured. High-quality materials as well as absolute reliability "Made in Germany" You have a 3-year warranty.