USB 300 is a USB gateway for connecting EnOcean radio devices to a PC or smart home server. It uses the TCM 310 transceiver module and gateway controller software to provide bidirectional radio communication through a virtual serial interface. USB 300 supports additional features like signal strength monitoring, repeater functionality, and filtering of radio telegrams. It has been certified for use in various regions including CE marking in Europe, FCC and IC approvals in North America, and complies with the RoHS directive.