JBL combines wireless audio streaming and portability with the gray Charge 4 Portable Bluetooth Speaker. This speaker features a proprietary developed driver and two JBL bass radiators that intensify sound with strong deep bass. Its high-capacity 7800mAh rechargeable lithium-ion battery provides up to 20 hours of playtime. This speaker carries a convenient USB Type-C charge out to quickly power your mobile devices, such as your smartphone or tablet. The Charge 4 features a rugged design and IPX7 waterproof rated exterior, which adds protection in any environment. Together with JBL Connect+, this speaker can link with more than 100 JBL Connect+ enabled speakers together to amplify your listening experience.