Compatible with Ring Gen 4 Charger Size 15, Fast Charging Dock with USB-C Cable Choose the Correct Size: Please carefully check the size of your ring and select the appropriate charger size. Charging Time: It typically takes 60-120 minutes to fully charge your ring, depending on its current battery level and ambient temperature. Sturdy and Portable: Made of high-quality metal material, our charger are more sturdy and durable. The compact design makes it easy to carry and use in the car, office, travel. Safe Charging: Build-in muti-protection systems for protecting your ring from over current, over charging and over heating. Charger Compatible with Ring Gen 4 Size 15, Fast Charging Dock with USB-C Cable