Lifesize Room Controller app The Lifesize Room Controller is a tablet application designed to control your video collaboration experience without the need for a mouse and keyboard during meetings. The Room Controller app puts easy to use in-call controls, such as mute, add participants and record, right at your fingertips. Start a call from your global directory or quickly join a meeting that has already started. Wirelessly share your screen during a video meeting or with someone in the same room. The Lifesize Room Controller app helps complete your Dash room solution while keeping meetings simple and clutter free for your smallest spaces.