Can you fight for 24 hours? This is an adrenaline molecule necklace for you. Adrenaline is a hormone and neurotransmitter also known as epinephrine. As it is called the "fight or flight" hormone, it plays a central role in stress reactions such as protecting and predating. If you don't feel pain even if you are bleeding or have a broken bone, you're getting a lot of adrenaline. If you are a geek or a science student, why don't you try wearing it to show your sense of science? It is also recommended as a small gift for science people! Also, it is perfect for those who are not interested in science but are looking for unique accessories. The chain length is 45 cm, which is easy for both men and women to use, and it can be adjusted to about +4 cm with an adjuster. The size of the structural formula part is about 3.5 cm x 2.0 cm. Available in gold, silver and black colors. The material of the structural formula part is made of rust-resistant and wear-resistant anodized aluminum, but please avoid to expose it to sweat or water for a long time, or to rub it on a hard object. Also, please note that unevenness may occur on the surface during aluminum oxidation. Since anodized aluminum is a soft material, it may bend when force is applied. If it is deformed, gently bend it in the opposite direction to return it to the original shape, but be careful not to bend or return it too many times and it may break.