Kindly Notice If you are in Turkey, please leave a message to modify the IMEI number for GPS Tracker Device,or contact us after making the order, we will help you to modify the IMEI number. If you are in Chile or Colombia,after you receive the product, you should register IMEI in your country as soon as possible, otherwise the device is not allowed to be used in your country. How to inquire imei number:you can send SMS command :imei123456. GPS108A/B This GPS Tracker is a 2G GSM GPS Tracker. It is working based on the existing 2G GSM/GPRS network and GPS satellites. If your country closed the 2G network ,you can chose another 3G product! Advantages 10000mah Battery,longtime standby,free of charging frequently.With strong magnet built in,free of installation in the car. Realtime Tracking With multiple postioning ways,GPS+LBS,we can always know the accurate location of our car and protect the car. Monitor anytime, anywhere;We can track our car by SMS/Phone/Tablet/Computer. Voice Monitor Send SMS command : Monitor+passwordThe device will enter the monitor mode and we can hear the sound around the device.