Model S GPS Tracker Product Introduction 1. Main Features 1) Fully support owner checking and operating GPS tracker by SMS. 2) Can position even no GPS signal, with unique patent technology in the global. 3) Use independent intellectual property rights AGPS technology to quicken positioning speed. 4) Price is the lowest in the industry peers. 2. Specifications 1) GPS Features Chipsets: SiRF Star Ⅲ(GSC3f/LP) Channel: Paralleled 20 Channels Sensitivity: