The product was first released in April 2004 as a replacement for Zire 21.

It runs Palm OS 5.2.8 and features a color 160×160 display, a SDIO slot and a standard 3.5mm stereo headphones jack.

The improved PIM apps (Calendar, Contacts, Tasks and Memos) are supplied.

The ROM includes RealOne Player giving the device some digital audio player capabilities.

[2] It was replaced by the Z22, which lacks the SD/MMC/SDIO Expansion and headphone jack.