With the USB (Universal Serial Bus) converter (Eheim Interface) you can connect the Eheim professionel 3e external filter to a computer via a USB (Universal Serial Bus) port. The functions can be easily & conveniently controlled monitored & updated using the Eheim Control Center programme. The Eheim Control Center software lets you adjust control & update your EHEIM professionel 3e external filter & much more via your PC. The Eheim Interface at a glance Adjust & update your filter via your PC Simple easy-to use programme Free user-friendly Eheim Control Center software Note Before connecting your computer & the external filter with the EHEIM Interface you must ensure that the EHEIM Control Center has been successfully installed. The EHEIM Control Center is compatible with Windows XP (TM) / Windows® Vista / Windows® 7 (32/64-Bit). The EHEIM Interface is not delivered via CD. Instead you can find an up-to-date free version here Click here