There are myriad devices like the Philips Hue that can be controlled with a smartphone, but how about just... a switch? A company called Avi-on was thinking the same thing, so it created a movable Bluetooth dimmer switch that simply sticks to your wall without any holes or wiring. It can be used to control a number of GE-branded Bluetooth devices, like its Smart Bulbs and indoor and outdoor plugs. The system doesn't require a hub, and Avi-on claims the switch's battery will last "multi-years." If you do want to use a smartphone instead, the company also has iOS and Android apps, with features like timers, scheduling and smart device grouping.