THE REPORTER Wireless Indoor/Outdoor Intercom Unit Unlimited unit expansion unit mounts easily to any surface, even in shower Digital sound quality is clear and secure with a 1,000" range Comptatible with portable intercoms (RWIS/RWIA) and flush-mount intercoms (RIFMS2/RIFMS1) Uses 4 AA batteries Includes stainless steel screws or 3M double-sided tape for mounting