Yellow Chimes Titanium Steel Temperature Feeling Heartbeat ECG Combo Couple Rings for Women & Men Unique Ecg Heartbeat Engagement Ring which changes color with Emotional Teperature- A Unique and Best Gift In Valentine'S Day Or Wedding. It's the little things that keep romance going strong. Couple ring is perfect for romantic gift for couples this Valentine's Day, Anniversaries, Birthdays and more! PLATING - IPS process of plating makes it never fading of color, and keeps the shine. PREMIUM QUALITY: Pure surgical stainless steel is used to make this product, which doesnt cause any harm to skin. Nickel free and Lead free as per International Standards. No harm to health. Size: Female ring is US7, Male ring is US 9 Gift for Her/Him- Ideal for Proposal, Engagement, Wedding, Valentine, Birthday, Anniversary gift for someone you ❤ LOVE ❤.