The smart grid is a network created by combining information technology, communication technology, and electrical power systems which allows two-way digital communication between suppliers and consumers. It monitors power supply and usage. Key features include improved reliability through self-healing of outages without technicians, flexibility to handle bi-directional power flows from distributed generation, and greater efficiency including demand-side management. Smart grids differ from classical grids in their ability to more efficiently manage peak loads through automation and demand response as well as integrate distributed generation and cogeneration. Smart meters are a key component used in smart grid technology to monitor usage.