JBL - Charge 4 Waterproof Bluetooth Speakerthe JBL Charge 4 portable Bluetooth speaker with full-spectrum, powerful sound and a built-in power bank to charge devices. It features a proprietary developed driver and two JBL bass radiators that intensify sound with strong deep bass. Its high-capacity 7800mAh rechargeable Li-ion battery provides up to 20 hours of playtime. The speaker carries a convenient USB charge out to quickly charge devices, such as a smartphone, so users will never run out of power again. The Charge 4 features a rugged design, IPX7 waterproof rated exterior. Together with JBL Connect+ it can wirelessly link more than 100 JBL Connect+ enabled speakers to elevate the listening experience.Product Features:Wirelessly connect up to 2 smartphones or tablets to the speaker and take turns enjoying powerful sound.Built-in rechargeable Li-ion 7800mAH battery supports up to 20 hours of playtime and charges a device via USB port.Take Charge 4 to the beach or the pool without worrying about spills or even submersion in water.Amplify the listening experience to epic levels and rock the party perfectly by wirelessly connecting more than 100 JBL Connect+ enabled speakers.