S99 smart watch uses 1.33 inch HD touch screen?? built-in MTK6580M Quad-cores cpu?? Android 5.1 OS?? RAM 512MB + ROM 8G?? as a standalone cellphone??making it more fluently and smoothly to run appliactions. It also supports the Goolge Play?? you can download all kinds of apps to customize your smart watch.</br>S99 Smart Watch Cell Phone can independently make / receive phone calls with one SIM card of 2G GSM 850/900/1800/1900?? 3G WCDMA 850/2100 internet. After you put your SIM card in it?? you can use it as an Android smart phone to make calls can send messages. And it supports WIFI and bluetooth 4.0</br>It supports GPS map tracking?? satellite positioning?? with Voice assistant?? GPS help you to locate and determine the correct direction.</br>Heart Rate Monitor: S99 Smart Watch Cell Phone comes with high accuracy heart rate sensor?? it will help you to know your heart rate status anytime anywhere. Be your own immediate health steward. Enjo"life!</br>Other functions: HD Camera?? Video Record?? Voice Record?? Find Phone?? Pedometer?? Sedentary reminder?? Water remainder?? Gravity sensor?? Remote control music and control camera. We offer 1 year quality warranty?? 30 days return and money back?? 24 hours email service. if you have any question or problem of the watch?? please feel free to send us email: sepver@163.com . we will try our best to help you to solve the problem and make you satisfy.</br></br>Product Description</br></br><br><b>Functions for Entertainment: </b><br><br> Camera?? Video recorder?? MP3 player?? Video player?? HD Sound Recorder?? WiFi?? Broweser?? GPS navigation?? Location Weather?? Google Play?? Google Voice?? Alarm clock?? Calendar?? Pedometer?? Heart rate monitor?? File manager?? Remote Control?? Anti lost?? Message Reminder?? Secondary Alert<br> <br> <b>Note:</b><br> 1: Because the smart watch app and software has occupied about 2.8GB memory?? the rest free using memory is about 5.2GB.<br> 2: " Android 5.0 or above phone?? It doesn't support IOS phone.<br> <br><b>Specification:</b><br> <br>Hard Parameters:<br> *Phone type:3G Android watch phone<br> *Operation system: Android OS v5.1<br> *CPU: MTK6580M 1.3G Quad-cores<br> *Screen size: 1.33 inch HD full round screen true color screen(PWM back light)<br> *Screen resolution: 360*360 ppi<br> *Battery capacity: 400mAh<br> *Standby time: 48 hours<br>*Continuous call time: 4 hours<br>*SIM card type: Nano SIM (Si