CLZZ Silver Bluetooth Watch 30 MP Camera 128M+64M Storage, Silver All-in-1:Make phone call directly from the smart watch, including answering and dial-up. SIM slot,support make calls by Bluetooth Mode or Smartwatch Mode. Compatibility: All Android and iOS Mobile Phone & Android Tablet PC. Android Mobile Phone: Samsung, HTC, Sony, LG, HUAWEI, ZTE, OPPO, XIAOMI, and so on. iOS Mobile Phone: iPhone 6, iPhone 6 plus, iPhone 5, iPhone 5s , iPhone 4, iPhone 4s (This APP can' t be installed by iOS, Apple system can' t sync SMS and Bluetooth push information, but other functions can be used by iPhone); Android Tablet PC: Samsung, Nexus, Onda, Newsmy, and so on. Function Description: Pedometer, Sleep Monitor, Audio Player, Video,Camera, Calendar, Calculator, Facebook, Twitter, Wechat, Stop Watch and more Sync: Twitter, Facebook; time, schedule, read message or news (the fuction only supports Android system,it is unavailable on iOS) 2 Slots 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.