These Phone cases will change colors in response to heat! Hold them in your hands or leave them in the sun to watch them change colors right before your eyes! Made with durable and shock-absorbent plastic and rubber to keep your phone stylish, slim and safe. Heat Sensitive Thermal Sensor Phone Case Cover Matte Back Case for iPhone 6, 7 Plus Color Changing with Temperature Thermal Induction Discoloration If you have not received the phone cover case we presented to you, make sure to order it immediately. If you have trouble with the purchase time, please report to customer service So if you find a current lower price from an online retailer on an identical, in-stock product, tell us and we'll match it. We truly believe we make some of the most innovative products in the world, and we want to make sure we back that up with a risk-free ironclad 30 day guarantee. If you don't have a positive experience for ANY reason, we will do WHATEVER it takes to make sure you are 100% satisfied with your purchase. Buying items online can be a daunting task, so we want you to realize that there is absolute ZERO risk in buying something and trying it out. If you don't like it, no hard feelings we'll make it right We have 24/7/365 Ticket and Email Support. Please contact us if you need assistance. Remember: Shipping usually takes 2-3 weeks read our Shipping For more details!