NESAN Smart Switch is a part of smart home/office automation system connected to wi-fi network. With the Smart Switch, users can turn on or off all systems that can be electrically controlled by mobile phones in their homes or offices. The Smart Switch is constantly connected to the wi-fi network in the home or office. Users can switch on/off electrically on the same wi-fi network at any time. The system can operate without the need for any extra power supply, using the existing electrical and switch structure in the home. Users can perform the controls either via the existing switch or via their smartphone.