Operating system-NO
Special feature-Anti-Scratch
Connectivity technology-NO
Battery cell composition-Other Than Listed
sylacor 14 Pack Ring Cover Compatible with Oura Ring Gen 4/Gen 3 Horizon/Gen 3 Heritage, Ultra-Thin Anti-Scratch Silicone Ring Case for Women Men, Support Charging with Cover on
Compatible Models: sylacor Ring Cover, designed for Oura Ring Gen 4/Gen 3 Horizon/Gen 3 Heritage, Ultrahuman Ring and Rinconn. They will fit really perfectly over the ring.
Orientation Indictar: Upgraded sensors mark. You can see the notch location to line up the sensors without looking inside the ring. Easy and convenient. Save your time.
Scratch-Proof: Small piece but can provide the ring with optimal protection. It's a practical solution for protecting your ring during activities like workouts, manual labor, or outdoor adventures.
Beautiful Colors: Different color combinations, you can change the colors to match your ring to your outfit. Please contact us if you have any questions about the cover set.