Marshall Multi-Room is a free Android app developed by Zound Industries International AB. It is designed to work with Marshall Wireless Multi-Room System and unlock the full potential of your wireless speakers. With this app, users can group or ungroup their Multi-Room speakers, save, play, and change their seven presets, and access thousands of internet radio stations.

The app also comes with an in-app equalizer that allows users to tweak treble and bass balance to their preference. Additionally, users can adjust the intensity of the LEDs to match their mood. With its user-friendly interface, Marshall Multi-Room is an excellent app that offers an immersive audio experience.

Overall, the Marshall Multi-Room app is a must-have for anyone who owns a Marshall Wireless Multi-Room System. It is easy to use and offers a wide range of features that enhance the audio experience.