The Unibrander Smart UV-Sensing Color Changing Technology Sports Band is a compatible strap for Apple Watch models ranging from Series 1 to Series 10. Made of silicone, the band offers a comfortable fit and is designed to automatically adjust its color from white to pink based on the UV exposure. This smart band not only adds style to your Apple Watch but also provides a convenient and practical solution for tracking your exposure to sunlight. Perfect for outdoor activities or everyday use, this sporty and functional accessory is a must-have for any Apple Watch owner.