The EBC 406 is the first of the new line of digital EBC ELT's. Designed with the newest technology it also incorporates the best and proven features that characterize all of EBC's emergency locator transmitters. These transmitters have encapsulated electronics and battery packs to provide for added protection against shock, moisture, and other environmental hazards. They have a built-in monitor that emits a loud beeping tone if the ELT is activated. They can be activated either automatically or manually.