This is a 14 mukhi rudraksha to be worn on the head touching the middle portion between the eyebrows. The 14 mukhi rudraksha is a powerful bead, also known as Dev Mani. It neutralises the effects of Sade Saati and also improves visualization power. Higher level of meditation is done by using 14 mukhi rudraksha tied on the head keeping it at the Ajna Chakra and counting of the mantra using a mala of either five mukhi or 2 mukhi It is useful for kundalini awakening, by combining the meditation with Pranayams and going upwards with chakras.
References : Kamal N Seetha (2014) The Power Of Rudraksha