Xikang B1S Bluetooth Smart Watches 2 Inch LCD Touchscreen for Android and Iphone Smartphones Waterproof Dustproof Black Compatible with both Apple (iOS 7 and higher) and Android devices (OS 4.0 and higher) View notifications from email, SMS, Caller ID, calendar and your favorite apps on your wrist Control music playing on iTunes, Spotify, Pandora and more Rechargeable battery lasts 2-4 days on a single charge To use the music feature, you need to first transfer your tunes into the Buddy 8 GB integrated memory.Your smartwatch acts like a USB key