When put the chain under led light, people can see through each beads. There is a red light insde the bead, looks like blood of dragon. That's also the origin of its name.
Story of profduct:
Buddhist prayer beads or malas are a traditional tool used to count the number of times a mantra is recited, breaths while meditating, counting prostrations, or the repetitions of a Buddha’s name.
The number 108 is considered sacred by the many religions, such as Hinduism, Buddhism, and Jainism. 108 is a multiple of 9, a number of eternity. Islamic people believe that 108 is the number of God. Hindus people believe that there are 108 deities, each deity has 108 names, etc…
In Tibetan Buddhism, they believe that the average number of breaths per day is 21,600. 10800 is the energy of Sun and same for Moon. So 108 is a sacred number for people who practice Zen or recite mantra.