Additional energy-efficient LED light bulb with a built-in 2.4 GHz JBL speaker to be used with an existing Pulse sound system Must have already purchased a Pulse Master bulb or a Pulse Link Starter Kit in order to be able to use this Satellite bulb Easy to install - Simply screw into any standard E26 light socket or fixture, no wires needed, bulbs work up to 100 feet apart App controlled - Play music, adjust volume and set brightness directly from an iOS or Android device Customizable sound system - Up to 8 Pulse bulbs can be linked together and they can be connected to subwoofers and TVs via the Pulse Amp and Pulse Link adapters (sold separately)