The Palm ZIRE 21 is a personal digital assistant (PDA) that was released in 2004. It features a 160x160 pixel monochrome display, 8MB of memory, and runs on the Palm OS 5.2.1 operating system. The device is designed to help users stay organized by providing features such as a calendar, address book, to-do list, and memo pad. It also has the ability to synchronize with a computer, allowing users to transfer data between the two devices. Our website offers a range of screen protectors for the Palm ZIRE 21 to help protect the device's display from scratches and other damage.