The USAlert WatchDog LT Pager Programmer includes a programming fixture, a serial cable, a USB cable, a USB-to-Serial Adapter, driver software for the USB-to-Serial Adapter, and WatchDog LT programming software. The LT Programmer hardware can be used interchangeably with both WatchDog LT and USAlert WatchDog Pagers. LT Programmer software is compatible with later versions of the WatchDog Pager, but earlier versions of the WatchDog Pager must be programmed with a different software version.