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• Two Cards Slot Design - The Smart Watch acts as a phone with a micro SIM card, you can also write and send messages via the Smart Watch. Expand its storage for MP3/MP4 files with a TF card, supports maximum 32G. • Main Features - Make and receive phone calls directly from the smart watch. Switch phone calls from the Smart Watch to your mobile device easily and conveniently. • Function Description - Pedometer, Sleep Monitor, Audio Player, Camera, Calendar, Calculator, Facebook, Twitter, Stop Watch and more. • Wide Compatibility - Fully compatible with Android Powered smart phones. Please be noted, Message notifications, Facebook & Twitter Notifications are unavailable for iPhone, Windows Phone and BlackBerry devices. You can only pair the 2 devices via Bluetooth. • IPhone Users Get - Basic synchronization features based on a successful Bluetooth Connection. Such as: Contacts & Call Records synchronization, Make phone calls via Bluetooth, Check Calendar, Pedometer etc. App notifications are unavailable on iPhone.