Village Lighting V-20672 Light Stream™ 3 Wireless Switch: Light Stream™ revolutionizes the way you decorate for the holidays by replacing your bulbs with a smart phone controlled LED bulb system. All settings and functionality that you set within the Light Stream™ app is controlled and managed by the controller, which sends signals to switches and bulbs. The switches, used at the beginning of each strand or run of lights, boosts the signal and sends on/off commands to the Light Stream™ bulbs.