This watch has two working mode. One is company mode (Bluetooth) , It enable to make call or receive call or send or get message via Bluetooth. The other one is Network mode (Sim Card inserted) .It enable to make call or receive call and send or get message via the sim card you inserted which means at this time this watch works as a real cellphone,you can hang out without your cellphone. •Sleep Monitor,Sedentary Reminder,allows you to understand the movement distance,time anytime and anywhere •Once you sync your mobile phone to this smart watch it will keep track of where your phone is •Bluetooth Dialer, Call Reminder, Bluetooth Call,Bluetooth SMS/IM Message Notifier •Sync function: QQ,wechat,Twitter,Facebook;time,schedule,read message or news;Sport health: Pedometer,sedentary remind,sleep monitoring •This watch can also work with iPhone as a Bluetooth device(Means you can receive a call or make a call also sync your contacts to this watch via bluetooth).But Some functions like Notification Push,Remote capture,Anti-lost are currently unavailable on iOS because the iOS app is unavailable now •HD display: High sensitive capacitive touch screen;perfect match technology