The Phra Kring is essentially a Mahayana-style Buddha image, despite the fact that Thailand adheres to Theravada Buddhism. The beliefs about the powers of the Phra Kring, are that the Phra Kring is the image of Pra Pai Sachaya Kuru (????????????? Bhaisajyaguru, Yàoshifó, in Chinese, or in Japanese'Yakushi'). Pra Pai Sachaya Kuru ('guru') is the medicine Buddha.
The image is normally in the posture of sitting and holding an alms bowl or a guava, gourd or a vajra. This was a fully enlightened Buddha, who achieved purity of body and mind, and who was a great teacher of human beings, who has the miracle that he who hears his name in passing, or see his image, will be healed, and live a long healthy and prosperous life with wealthy standing. The Pra Kring Buddha, or Bhaisajyaguru is one of seven Bhaisajayagurus and is said to have two Bodhisattvas under him Pra Suriya Bprapaa Potisat (Suriya Bhrapa Bodhisattva), and the Pra Jantra Bprapaa Potisat (Chandra Bhrapa Bodhisattva).Of all the other Buddhist countries who revere it, only Thailand is responsible for its making. The Phra Kring in most cases (except in the odd example where Muan Sarn powders prevent the sound), will have a rattling bead inside it. The reason for this rattle sound, made by a sacred bead of Chanuan Muan Sarn or other relic, is that it is the name of the medicine Buddha resounding, as you pass along your way, healing and blessing you with safety, health, prosperity, metta for auspicious friendly loving kindness. Some Phra Kring however do not make a sound that is audible to humans, but still have a piece of Chanuan within, which emits the name of the medicine Buddha silently, only audible on the spiritual plane. Latin America and the Caribbean: 4-15 weeks.
North Africa and the Middle East: 3-5 weeks.