Multifunctional Design: One button on/off, with consumption record, switch log(history record), relay status set (on/off/remember last status), 4 light modes switching (indicate switch on/off, indicate switch location, on, off), clear electricity usage, etc.Multifunctional Design: One button on/off, with consumption record, switch log(history record), relay status set (on/off/remember last status), 4 light modes switching (indicate switch on/off, indicate switch location, on, off), clear electricity usage, etc.Multifunctional Design: One button on/off, with consumption record, switch log(history record), relay status set (on/off/remember last status), 4 light modes switching (indicate switch on/off, indicate switch location, on, off), clear electricity usage, etc.Multifunctional Design: One button on/off, with consumption record, switch log(history record), relay status set (on/off/remember last status), 4 light modes switching (indicate switch on/off, indicate switch location, on, off), clear electricity usage, etc.Multifunctional Design: One button on/off, with consumption record, switch log(history record), relay status set (on/off/remember last status), 4 light modes switching (indicate switch on/off, indicate switch location, on, off), clear electricity usage, etc.Multifunctional Design: One button on/off, with consumption record, switch log(history record), relay status set (on/off/remember last status), 4 light modes switching (indicate switch on/off, indicate switch location, on, off), clear electricity usage, etc.