With quality certificate Although fakes are also circulating, this is a genuine product with a certificate. I received it as a gift, but the size was too big for me. Therefore, I am selling it. 4series Necklace SILVER×BLACK The 4 series is a series that can be used widely from athletes to lifestyle, with a well-balanced blend of 846YAJIRO ingredients. Similar to the 8 series, it greatly affects daily physical condition management and aims to improve athlete performance and avoid fatigue accumulation. ◇ Black titanium parts [BLACK TITA22] ◇ Glossy black YAJIRO crystal blend What is [DEEP BALANCER]? 846YAJIRO Deep Balancer is a product that emits electromagnetic waves that are effective for the human body, successfully processed and formed by carefully selecting and blending special raw materials that exist only in limited regions, and using extremely high temperatures and unique development technology. As a result, the ultra-advanced gear part [YAJIRO Crystal] emits electromagnetic waves effective for the human body, such as growth rays and far-infrared rays, stimulating and activating cells, and approaching the water in the body, which accounts for about 70% to 80% of the body. It is a recovery gear developed with the theme of rapid fatigue recovery. * Effects and reactions on the body vary from person to person. It is not a medical device or medicine. What is titanium parts [TITA22]? Titanium parts [TITA22], which are specially processed by utilizing the characteristics of 846YAJIRO Deep Balancer, use titanium handmade by craftsmen in Fukui SABAE (Sabae). Because it is titanium-based, it is designed to be very resistant to sweat and water, and is compatible with competitive swimming and training in the pool. It has excellent safety and durability. There are 3 colors: GOLD, SILVER, and BLACK. Size Length L size 50cm Material / Material / Color Material / Color Crystal YAJIRO Crystal Silver x Black Clasp Titanium Black