The Elvox 8100 Series Compact Surface Mount Panels are designed to be durable and aesthetically pleasing. Multiple 8100 units to be combined audio or audio-video panels of virtually any size. The 8100 Series is constructed of an extruded aluminum plate and ABS plastic backbox. The 8100 Series is rated for indoor and outdoor use in both audio and audio video applications. A built in backlit name tag is provided with each apartment ring push-button. The backlight also illuminates a ring around each pushbutton. The 8100 accepts 930 series speaker mics and 559A-559B-561A camera/speaker/mic modules.