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One of the lesser-known companies in the smart home automation community, Linear makes power outlets you can install to replace your less exciting outlets. They work with Z-Wave to provide on/off control remotely, and some act as a wireless repeater to strengthen the wireless transmission of various devices in your network.
Linear has been involved in the building of wireless electronics for 53 years, and is considered to be the largest consumer of Z-Wave chips for smart devices to date. Their outlets can be purchased online, or in the home improvement sections of your local Home Depot or Lowes.