JBL Boombox 4 Wireless Portable Speaker Color:Blue From base training to speed-focused

From base training to speed-focused Fartlek sessions

or right—for a wider viewing angle and a more secure viewing experience

Pristine clarity

interior and rear view recording

The hammerhead has been meticulously forged from high-quality steel

JBL Boombox 4 Wireless Portable Speaker Color:Blue From base training to speed-focusedUnbeatable JBL Pro Sound with AI Sound Boost Were talking massive sound with deep and punchy bass. The redesigned JBL Boombox 4 packs in two bigger woofers, two tweeters and three passive radiators, so every track hits harder and sounds cleaner. And with AI Sound Boost, you dont have to lift a fingerthis smart tech analyzes the music in real time and adjusts the sound to give us more power with less distortion, even when its turned all the way up. Up