Description:This mood necklace can sense your body temperature to test your mood. Color changes with your body temperature, and body temperature changes with your mood.If your body temperature is below 14C, the pedant's color is black, and color varies in the range of 14-38C.You can make it a fashion necklace jewelry to decorate your daily look, and also can make it as a funny interesting toy to test your mood and body temperature.Suitable for many occasions such as birthdays, graduations, anniversaries, weddings, Christmas, Easter, Valentine's day and Mother's day.Best gifts for mom, your lover, wife, daughter, fiancee and girlfriend, best friend, sister, etc.Specification:Chain Material: Stainless SteelPendant Material: Zinc AlloyChain Length(adjustable): approx. 19.69inch/50cm, Chain Width: 2mm/0.08inchPedant Size: approx. 1.18x1.14inch/3x2.9cmWeight: approx. 8.5gPackage Includes:1 Piece Dolphin Mood Necklace(including 1 piece color card)(3 Pack)Note:Lowest temperature is 0 Chighest temperature is 38C.It is forbidden from chemicals and any temperature water.Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.