[. . . ] Each entertainment system is different so you may need to get creative with how you position your Blaster and Mini Blasters. [. . . ] Your Blaster receives RF signals from your remote and flashes IR signals to your devices. Plug the Blaster into the wall and place it on a shelf in your cabinet. Your Mini Blasters add extra coverage by flashing devices that your Blaster can't reach. Plug the Mini Blasters into the back of the Blaster and place each one on its own shelf in your cabinet. You're just a few steps away from the freedom to roam and control your home entertaiment system at the same time. Harmony 900 accessories Phone support information and hours can be found in your account. [. . . ] Logitech assumes no responsibility for any errors that may appear in this manual. [. . . ]