uxcell 4 Pack Energy Saving Wireless Remote Control Electrical US Socket Outlet Switch Plug for Household Appliances Lamps, Lighting & Electrical Equipment Save on your electric bills and extend product life by up to 15%. Not to plug in and unplug your electric appliances to conserve energy consumption. Strong RF signal works through doors and walls without interfering with other electronics. LED indication on the socket and the remote control, easy to set up and use. Self-Learning function allows you to match remote control and outlet to each other.