1. Live / Realtime tracking: the device supports both GPS and LBS dual positioning,GPS is main for outdoor position and LBS is main for indoor position. You can track your kids or elderly via Google Map by the app on phone, or high accuracy and speed platform on web.</br>2. Historical route: the device will keep a record of the historical route of the kids or elderly for three months, parents can check the records on smartphone or internet web.</br>3. Geo fence: after the geofence is set up, you will get alert notice when the kids or elderly are out of the range of setup circle, which will secure the kids' or elderly's safety and keep you a peace of mind.</br>4. Voice call and message: with call button and two way voice function, the kids can press the call button and talk with parents whenever they want,you can send voice message to kids by pressing " Hold to talk" on phone app, and kids can also the press the Call button on the GPS watch to record voice message and send it to smartphone, and it also has a take off alarm.</br>5. This item is authorized with FCC and CE certification, full 1-year US warranty and lifetime technical support provided directly from Dreamclub.</br></br>Product Description</br></br><b>*** SIM CARD is not included ***</b><br><br><b>Introduction:</b><br>1.It is a GPS Watch Tracker/locator for kids/adult/elderly safety.<br>2.It is a global GPS device.<br>3.It is compatible with android and iOS for phone APP, you can also view it on web page.<br>4.<b>It need a micro prepaid sim card support 2G GSM network with voice, sms and data plan.</b><br><br><b>Notes:</b><br> 1.The device ID is labelled on the red cover inside of giftbox, a 10 bits number, start with 4700......, the default password is 123456, you can also get it by opening the back cover of the device.<br>2.If you have more than 2 devices, and want to track them at the same time, please leave a message to us.<br>3.In United States, compatible micro sim cards are as below:<br><b>Prepaid T-mobile SIM card ("Pre-paid" plan with data and DO NOT work with 'Pay As You Go' plan)</b><br><b>Ting SIM card, TPO Mobile SIM card (with voice, sms and data plan)</b><br><b>SpeedTalk Mobile Card which has a $5 plan</b><br>4.<b>incompatible sim cards includes ATT, Sprint and Verizon etc.</b><br><br><b>Most important:</b><br> 1.You had better go outside to have a good GSM signal, if indoor, it may reply you a little later and confuse you.<br>2.<b>You must get your own APN information for your sim card in the device, and send a SMS text to the sim card in the device, to activate the device online, then it can communicate with the phone APP, or else it can not work!</b><br><br>Below is the example for T-mobile sim card:<br>APN name: fast.t-mobile.com<br>User name: (blank)<br>User password: (blank)<br>MCC: 310<br>MNC: 260<br><br>The correct format for the sms text is:<br><b>pw,123456,apn,APN name,User name,User password,MCCMNC#</b><br>So based on the sample of T-mobile APN info, you have to send this SMS text to activate the GPS watch:<br><b>pw,123456,apn,fast.t-mobile.com,,,310260#</b><br>After that, you will receive a SMS reply as below:<br><b>apn:fast.t-mobile.com;user:;passwork:;userdata:310260.</b><br></br><br/>http://www.amazon.com/gp/product/B01HORFSL2