play and charge endlesslyintroducing the jbl charge 4 portable bluetooth speaker with full-spectrum, powerful sound, and a built-in power bank to charge your devices. it features a proprietary developed driver and two jbl bass radiators that intensify sound with strong deep bass. its high-capacity 7500mah rechargeable li-ion battery provides up to 20 hours of playtime. the speaker carries a convenient usb charge out to quickly charge your devices, such as your smartphone, so you will never run out of power again. the charge 4 features a rugged design, ipx7 waterproof rated exterior, and comes in a suite of cool colors. together with jbl connect+, it can wirelessly link more than 100 jbl connect+ enabled speakers to elevate your listening experience.