MetaWatch STRATA MW3007 Smartwatch For iPhone And Android - Black (Certified Refurbished) This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 90-day warranty Compatible with Apple iPhone 4S and 5 iOS 6 Mac OS X 10.7 or later (for firmware updates) MetaWatch Manager App for iOS (download required) - Andoid 2.3 (Gingerbread) or later 96 x 96 resolution and Polymer Network LCD technology enables clear viewing, even in direct sunlight Bluetooth 4.0 technology (BR/BLE) Along with dual-mode wireless technology lets you link your compatible device to the watch remotely 3 ATM water resistance rating - anti-glare coating resists scratches