Meet the JBL Charge 4, a portable Bluetooth speaker with powerful full-spectrum sound and a built-in power bank to charge your devices. It features a proprietary driver and two JBL passive bass radiators that amplify the sound for deeper, richer bass. Its high capacity 7,500 mAh rechargeable Li-ion battery gives you up to 20 hours of battery life. The speaker has a convenient USB output that lets you quickly charge your devices, like your smartphone, so you never run out of batteries. The Charge 4 features a rugged design with an IPX7 waterproof rating ideal for outdoor use. It is available in many trendy colors. With the JBL Connect + system, you can wirelessly connect more than 100 JBL Connect + compatible speakers for an extraordinary listening experience.