1.??[Live Tracking] - The device supports both GPS and LBS dual positioning??GPS is mainly for outdoor position and LBS is mainly for indoor position. You can track your kids via Google Map by the app on phone.</br>2.??[Voice Call] - With call button and two way voice function?? the kids can press the call button and talk with parents whenever they want.</br>3.??[Voice Message] - You can send voice message to kids by pressing " to talk" on smartphone and kids can also the press the Call button on the GPS watch to record voice message and send it to smartphone.</br>4.[Need SIM Card] - The watch must work with SIM card and we don't supply the SIM card it must work with SIM card of 2G GSM band 900/1800/1900mhz with GPRS data planyou can confirm with your card supplier if it has 2G network signal with GPRS dada at your area. Please make sure you can get this SIM card before place the order!!!</br>5.[APN Set Up] - Some SIM card need to setup APN before access to GPRS network plz feel free contact us about how to setup APN if you need it.</br></br>Product Description</br></br><br><b>Featuers:</b></br> * Network Model: GSM<br /> * Data Service: GPRS<br /> * 2G: GSM 850/900/1800/1900<br /> * Hardware info: GPS chip: GPS MTK3337<br /> * 3D Acceleration Sensor: Positioning accuracy to 5 to 15 m<br /> * Battery: 500mAh Bulit-in<br /> * Standby Time: 53 Hours<br /> * Talk Time: 6 Hours<br /> * Basic Info: SOS emergency call:set SOS phone No: long press SOS button for 3 sec will call to admin phone no.<br /> * The Family Number: Can set three SOS number?? if the admin phone no. not answer??the call will loop three times<br /> * SMS Tracking: Send SMS to watch to get the watch's position.<br /> * PC??Smart Phone Tracking: APP download by QR-code or from our website.<br /> * LBS Tracking: If not have gps signal?? auto change to tracking by LBS APP download by QR-code or from our website.<br /> <br><b>Note:</b></br> 1. <b>SIM card is not included in the package.</b> The device ID is marked outs