The design concept of sterling silver chain necklaces is I love you to the moon and back. No matter how far you are, and no matter what happens, these sun and moon pendant chain remind you that I will be by your side, and I will love you from day to night.PROJECTION NECKLCE: This Projective Necklace used nano-micro technology to engrave "I Love You" in 100 different languages into the stone. When you shine a light through it and project it on a wall, or using phone camera to target the stone, it will project the 100 languages of ?I love you?.MAGNET COUPLES NECKLACE: A Pair magnetic attractive necklace comes in a set. There is a magnet design inside the sun and moon pendants, once they placed closely, they will connect to each other and attach to one another. It's a perfect gift that it represents the intimate relationship between you and the one you love.S925 STERLING SILVER: Our couple layered necklace is made of 925 sterling silver. It won't change color or get dark easily for a long-time wear. Hypoallergenic, nickel-free, lead-free, and cadmium free to prevent irritation, safe to wear in your daily life. Adjustable necklace chain, long and strong enough for men and women to wear.ROMANTIC PROMISE GIFT: The dainty matching necklace symbolizes love and friendship. It's a great jewelry present for couples, lovers, friends or sisters, a romantic gift on Valentine's Day, Wedding, Birthday, Anniversary, Engagement, Graduation, Christmas Day, or any special days to express your everlasting love.