The purpose of chanting beads is to recite the Buddha's heart, that is, to count beads while chanting Buddha, so that the heart can gradually stabilize. There is only one heart to recite Buddha. If you can't decide to recite Buddha, some Buddha beads are engraved with Buddha statues and Buddha characters to further remind people who recite Buddha, or those who wear Buddha beads, to be diligent, to recite Buddha, and not to be stubborn.
For related articles, please see the website of Shancai Buddha. There are many articles in it, search on Baidu: auspicious and wishful beads.