You can use the smart watch or mobile watches to make or answer calls. The watch's built-in speaker allows you to listen to your favorite music anywhere. Anti-lost alarm function, push notifications, remote camera. The watch has a sleep monitor, a pedometer, a sedentary reminder, water in-take reminder. Bluetooth Dialer, Pedometer, Sleep monitor, Sedentary Reminder, Music Player, Alarm Clock, Watch, Camera, Remote camera, Bluetooth SMS/Message Notifier, Message Reminder, Call Reminder, Answer Call, Dial Call, NFC for quick pairing. Sync function: WhatsApp, Twitter, Facebook, time, schedule, read message or news, Entertainment: MP3,MP4,Camera.Compatible to All Smartphone As like Samsung, Apple, Moto, Xiaomi Redmi, Gionee Lenovo, Oppo Vivo, Lava, Asus, Panasonic, Xolo, Spice etc. And Support 4G SIM & SD CARD..Package : 1 Smartwatch ,USB CABLE,USER GUIDE.