LRS RX-AC-BL Alphanumeric Coaster Pager - Coaster Call - Blue.The First. The Best. In 1993, LRS invented the first stacking coaster pager that started the guest paging revolution. With its patented charging system, LRS coaster pagers can be charged in any direction insuring a consistent and reliable charge every time.With our 16 years of experience, LRS continues to redefine the paging industry with customer-driven features. With our shock absorbing bumper and Lexan case, LRS now boasts that our coaster pager is the most durable guest pager in the industry. In addition, LRS has now included alphanumeric messaging with our Alphacoaster pager.