“Pack ID” is pronounced as [pæk aɪˈdiː]. The “pack” is pronounced like the word for a bundle or group, with the “a” sound as in “cat”. “ID” is an abbreviation for “identification” and is pronounced as “aɪˈdiː”, with the “i” sound as in “eye” and the “d” sound followed by the long “e” sound. When saying “Pack ID”, stress can be put on the first syllable of “pack” and on the “I” in “ID”.