Beacon for indoor GPS navigation system Indoor localization of objects and humans equipped with beacons Coverage radius of a beacon - up to 20 meters Can be used in security systems, advertising and other fields The Additional Beacon for Indoor GPS Navigation System is an integral part of indoor GPS navigation system. The Beacons are mounted on walls or ceilings to measure distance to other beacons and “hedgehog” using ultrasonic pulses. The beacons communicate with router wirelessly in ISM band. They are powered by LiPol battery or USB. The distance between beacons-neighbors is up to 20 meters. Clusters of beacons automatically assemble in a single map of beacons to cover large offices, malls, factory floors. Features: Absolute location precision: 1-3% of the distance to the beacons (several cm) Differential precision: 1-2 cm Coverage radius of a beacon: up to 20 meters Beacons form the system automatically, no manual coordinates measurements or entering required Note: Only one unit is included.