The Chaplet of Mercy is recited using ordinary rosary beads of five decades. The Chaplet is preceded by two opening prayers from the Diary of Saint Faustina and followed by a closing prayer.
For details on how to pray the Chaplet and more information about devotion to the Divine Mercy, visit the website of the Marian Fathers of the Immaculate Conception:
https://www.thedivinemercy.org/message/devotions/pray-the-chaplet