The Oura Ring 4 Ceramic (Midnight) is a stylish activity tracker made from high-quality ceramic, perfect for both indoor and outdoor use. This unisex adults' ring is powered by batteries and offers a display resolution of 240 x 240, providing accurate heart rate measurements and sleep tracking features. Its sleek design and compatibility with Android operating systems make it a versatile and reliable tool for those looking to track their fitness and well-being. Additionally, the ring has a battery life of up to 7 days, ensuring long-lasting use.
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