TAMO DOI SmartRing (Midnight Black)(Fits Ring Sizes 10,11) Subtle Notifications: Subtly vibrates to notify you of incoming calls, texts, emails and more. Be in Control: The VIP feature enables you to have complete control over which types of updates come through and even the ability to create a list of contacts of notification - worthy people and events. Stylish Yet Rugged: Available in two different colors, its sleek design is engineered to withstand day-to-day wears and tears, and is shock-resistant and waterproof. Smart Power: Low-energy Bluetooth 4.0 communications provides a stable connection between your phone and your Smart Ring. Easy to pair and use with Bluetooth enabled mobile device. Simply scroll the Smart Ring's screen to view your latest updates