Rotate it directly, touch it with your finger, the ring will display the temperature! Hold your finger for 20 to 30 seconds, the ring will subtly display the temperature number. This watch is made with excellent craftsmanship and the quality is very good. It is a stylish, creative and beautiful accessory that can make you look brighter. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.