for Butterfly Gemstone Color Change With Temperature Necklace for Butterfly Magic Emotion Feeling Mood Pendant Necklace Jewelry Feature: This type of color change mood necklace can perceive your temperature and test your mood. It is sensitive to temperature, so when your mood change, your body temperature may change with your mood. Different color represents different mood. Great gift choice for special occasions such as a Christmas,Valentines Day,Birthday, Anniversary, Wedding,Easter and Mother's Day Perfect for lovers,couple,girlfriend, wife, mom, best friend, etc. Warmly Tips: Please keep products away from water. Mood stone will lose it's function if submerged in water; Mood stones are also fragile, please use with care! Material: Stainless steel chain,Feeling warm piece. Color:Color Change With Temperature Size: Chain Length50cm/20" More detailed,please see photo Color:As Picture Show. Quantity: 1 Pc. Note: Size for manual measurement, there may be a 0 to 2 for cm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 Pc X Necklace.