Specifications include, but are not limited to: Nassau County, New York (the County) is currently seeking proposals from qualified individuals and entities authorized to do business in the State of New York, to provide the Nassau County Police Department with proposals for cellular based GPS tracking units for personal use. These tracking units will allow the user the ability with the push of a single button, to notify the police Department via its 911 call center, of threat to life situations or other serious police emergencies for immediate police response. The tracking devices will enable the Department to locate and communicate in real time with persons of concern, dignitaries, as well as high risk individuals upon activation of the devices any where they may go. The tracking units will work in conjunction with monitoring software that will allow police personnel the ability to easily locate the units location and continuously update its position until the situation is rectified.