R-35S GPS Covert Tracking surveillance system is a customized real time tracking solution specially designed for covert tracking. Based on the features of R-35, we have developed an ideal solution to intensify the strength of police force and law enforcement. The unit's special design brings the advantage of its capability to connect to large capacity batteries, such as 5500mA or 11000mA battery to extend its tracking duration. Both unit and battery are firmly placed in the waterproof box with magnetic bracket to cling to the assets. It's removable and can be attached to the bottom of the vehicles or anything that doesn't require installation. This innovative solution applies to tracking valuable goods, cargo, and expensive equipment.