1. Features: Realize the cover of GPS signal in NO GPS Signal places Small-sized Light-weighted Power-saving design Large Distant and Space Cover (about 2000 square meters) High efficient Strong Signal Transmitting Easy to install and operate Wireless Signal Transmitting, unnecessary to connect cable to the GPS receivers No limit on the GPS Signal receiver numbers Multi Solutions for different customers with different requirement 2. Scope of use: In any building where GPS signal is blocked. Skyscraper Underground Underground Garage In any house where GPS signal is required GPS Production Assembly GPS Room Lab GPS Product Exhibition University Classroom or Lab. Delicate Designed Box.