Features 1PROMOTES BLOOD CIRCULATION: Volcanic stones contain great energy and can be worn for a long time to promote blood circulation and accelerate metabolism. 2REDUCES INJURIES: Negative ion necklaces form a wall of protection against harmful magnetic waves, reducing the damage caused to the body. 3WITH AN ADJUSTABLE CORD: Negative ion pendant necklaces are fashionable and come with an adjustable length cord, or you can mix and match your own cord. 4HEALTH AND DECORATION FUNCTION: Volcanic energy pendant enhances cellular permeability, nutrition and immunity, combining health and decorative functions. 5EXCELLENT GIFT: Volcanic stone pendant is perfect for your important loved ones, family and friends, for everyday, parties, anniversaries, birthdays and more.Specification Item Type: Negative Ion PendantMaterial: Volcanic StoneSize: Pendant: Approx. 4.3x2.5x0.5cm / 1.7x1.0x0.2inPackage List 1 x Negative Ion PendantNotePlease allow some error due to manual measurement.