The fluorescent buttons on the silicone piece is made of environmentally friendly materials. It can absorb sunlight, natural light etc. It needs to accumulate light during the day and will only glow in the dark or in a low-light environment. ABS Key Fob Cover Case fit for Kia Optima Sorento Sportage Rio Soul Forte Carens Picanto Key fob accessories . Strong Protector:This ABS material key fob cover is easy to install and perfect snug fit,it feels soft and comfortable in hand, looks great and cool. We have 3 colors for choosing:Easy to install and prefect fit, looks great beautiful. Key signal will not be affected after using it. Make sure that you order a right cover,please compare the ads photos with your key fob before purchase this item. It is made of high quality Carbon Fiber Pattern ABS ,so it is healthy and safety to you. And it is durable for using and easy to clean.