We have excellent customer service and professional tech support. If you have any questions, PLEASE DON'T HESITATE TO CONTACT US.【<b>Whatsapp: +8615581010480</b>】<br><br> <b>TKSTAR GPS tracker is perfect for vehicle fleet management, cars, truck or anything else you'd like to track.</b><br><br>【3 Month Extra-Long Standby】:5000mA ultra large capacity rechargeable battery, can standby for 90days Maximum after fully charged(Without using the device at all). Normal Working time:1-3 week.(Battery life depends on how often the device is used. The higher the frequency, the shorter the battery time. The lower the frequency, the longer the battery time) <br><br> <b>If it shows "Not enabled" on the APP, we need to set APN first. </b><br> Firstly, Need to ask the carrier about the APN informtaion of the SIM card in tracker .( <b>APN name, APN username and APN password</b>)<br> Then send those command: <br> 1. gprs123456<br> 2. apn123456 "APN name"<br> 3. apnuser123456 "APN username" (no need to set if without apnuser) <br> 4. apnpasswd123456 "password" (no need to set if without password) <br> Have a space after 123456 , don’t need to send last two commands if sim card don’t have username and password<br> For example<br> <b>For Speedtalk</b><br> APN name：mobilenet<br> APN username：（none）<br> APN password（none）<br> Then send 2 commands: <br> 1.gprs123456<br> 2. apn123456 mobilenet<br> <b>If u do not know how to set APN, you can email us via Amazon, we can set apn for you, it's the easiest way.</b> <br><br> <b>Specifications: </b> <br> Network: GSM/GPRS(2G) <br> GPS accuracy: 16-32 ft<br> LBS accuracy: 328-3280ft<br> Working Time: 3 Weeks<br> Standby Time: about 90 days<br> Size: 90 x 72 x 22mm(3.54"-2.83"-0.87")<br><br> <b>Package: </b> <br> 1*gps tracker(SIM not include) <br> 1*instruction<br>