Hidden gps tracker for car began to slowly enter the driver’s eyes. Everyone wanted hidden gps tracker for car and more functions while choosing the tracker. I would like to ask everyone about other functions, do you really use them? Or how many other functions do you know? 1. GPS tracker battery low battery warning When the battery in the GPS tracker is about to run out, in order to better avoid the situation that cannot be located due to exhaustion of power, most of them are wireless GPS...