Temperature Ring Titanium Steel Mood Emotion Feeling Intelligent Sensitive Rings for Women Men Waterproof Stainless Steel Couple Ring Jewelry Size 6-13 This product adopts the principle of thermal temperature sensing. Wearing for 10-20 seconds, the temperature sensing display will be displayed-(built-in ultra-thin temperature sensing chip), creative, fashionable and personalized design. Built-in thermal temperature sensor, no external assistance (such as charging, battery, electronics). It can be used for a long time, and the temperature display is 24-- to 39 degrees, which changes according to body temperature. The temperature accuracy has an error of 0.5 degrees, the nature of the jewelry wearing, and the fashionable ring ring. Not medical, there are some errors-please be aware Product Name: New Temperature Smart Ring Metal: stainless steel Color: Black, blue, gold, rose gold, silver Ring size: US .6.7.8.9.10.11.12.13 Applicable to: wedding / party / engagement / anniversary / consultation / leisure / travel memorial Package includes: 1*Ring