Most would use the Nepali beads due to the low cost of this bead, though multiple Indonesian beads can be as effective. 
Caturmukhi is mentioned in various ancient sources such as the Shiva MahaPuran (Vidyesvara Samhita) Chapter 25 part 68 where it mentions;‘Four faces is Brahma himself.It quells the sins of man slaughter. Its vision and its and its contact instantaneously bestow the achievement of four aims of life. In Padma Puran Chapter 57 part 48:‘A Rudraksha with four mouths is Brahma himself; a brahmana on whose body it remains would become adept in all branches of knowledge and the best amongst those who know the Vedas; he would know all essential principles of religion and worldly prosperity and proficient in traditional law and in the Puranas. By wearing a Rudraksha with four mouths the sin of homicide or living in houses with with many beings quickly burns. Shiva is always pleased and he would be the lord of beings. Similarly he is born as the Lord and the man is not at all afraid.’ Also mentioned in Nirnayasindhu, Rudrakshajabalopanisad, and Srimaddevibhagavat. 
This bead is supposed to cure diseases such as mental disease, gall bladder, paralysis, yellow fever, and paralysis. Copyright © Sacred Rudraksha.