This is a spare or replacement modem for your Indoor GPS System (Indoor Positioning System (IPS)).
The router is the central controller of the indoor GPS system which calculates the position of a mobile beacon (“hedgehog”) 16 times per second based on data from the beacons. They communicate via USB with the dashboard and with the beacons wirelessly in ISM band.
This is the chain and sprocket kit for the IG42-DB4 robot platform. It includes 10 tooth and 15 tooth sprockets, 5 feet of chain, and 4 connecting links.
Use these roll pins to fix sprockets to a shaft and keep them locked in place.