RINGLY Bluetooth Smart Ring- Gunmetal/Onyx - (Previous Generation) Download the free Ringly app and connect your ring to your iOS or Android device. Never miss a message again - receive customized phone alerts on your ring with subtle vibration patterns and light. Select the most important notificationscalls, messages, apps or peoplethat you want to come through to your ring Rechargeable battery - lasts 2 - 3 days. Water-resistant design - keep your ring on when you wash your hands. Designed with a beautiful black onyx and gunmetal plated setting