ATian Dual SIM Card Car GPS Trackerwith Open door via cell phone Cut off Oil & Power remotely TK103B+ GPS car tracker with fleet management, central door locking and Dual SIM. Keep track of your car in real time with this versatile GPS tracker 2 different SIM cards can be inserted. This GPS Car Tracker is the ultimate safety device for your car, van, truck, or even the entire vehicle fleet You'll be able to remotely lock the door of your car and lock anyone who is inside of the vehicle until you get to the car If using a GPRS enabled SIM card, you'll even be able to monitor real-time movement of your vehicle with the supplied software on your computer On top of that, you'll also be able to record the audio inside the car using the detachable microscope