Pulse Amp instantly amplifies the overall sound quality from your Pulse Bluetooth® speaker system. Connects to your existing subwoofer with a 3.5mm jack to wirelessly transmit audio signal from a Pulse Master bulb. Adjust the volume, brightness & equalizer modes using the app. Enjoy high fidelity stereo in any room with 13-watt JBL® loudspeakers. Use your subwoofer with your Pulse bulbs. Simply twist your bulbs into standard light sockets & play.