GSM GPRS GPS Tracker for Car/Old People/Children/Pets 900/1800/1900MHz by OEM. $49.57. Working Based on existing GSM/GPRS network and GPS satellites, this product can locate and monitor any remote targets by SMS or internet. Applications: Vehicle Rental &amp; Fleet Management etc. Protect children, the old, the disabled, pets, etc. Provide peace-of-mind for businessmen. Manage personnel. Track criminals secretly.  Geo-fencing to restrict movement to a defined radius. No mon...