With high quality and1.54'' quick touch 240x240 pixel screen,offering you Compatible user experience. Support micro sim card(only support GSM 2G), you can use Y1 smartwatch independently without your phone or make calls and answer the phone directly when paired with Android smartphone. Connect your smartphone via Bluetooth, it supports receive push notifications from Anti-lost, , Calls, Message, Wechat, , E-mail, you can check at all times, any message will not be missed more. Health tracking like pedometer, sleep Monitor, sedentary reminder, you can enjoy sports by recording your total steps,distance traveled, understand your quality of sleep, enjoy your life anytime and anywhere. With the amazing and long lasting battery of 280mAH, The watch lasts for a whole day in full usage easily. Comes with 2G Sim Card Support( Gsm, Micro Sim ),Tf Card Upto 16 Gb, Supported.