The Oura Ring Gen 4 Ceramic Size 6 in Midnight (Deep Blue) is a brand new, never opened activity tracker that provides heart rate monitoring and sleep tracking. It features a 240 x 240 display resolution, batteries as the power source, and a ceramic material design. The set includes the ring, stand, and USB charging cable,Designed for unisex adults, this ring-based activity tracker is suitable for indoor and outdoor use, with a focus on running and jogging activities. The Oura Ring Gen 4 offers up to 7 days of battery life and comes with English language settings.