The JBL JBLCHARGE4BLK Charge 4 Portable Waterproof Bluetooth Speaker has a rugged exterior that makes it the perfect pick for all your outdoor adventures. It is innovatively designed and comes in a stunning black finish. This JBL speaker incorporates high-end features to deliver top-of-the-line performance. It includes two JBL bass radiators that help it generate rich and powerful, stereo sound quality, keeping your mind and senses immersed. This remarkable JBL speaker boasts of a long-lasting, rechargeable Li-ion 7500mAH battery that lasts for up to 20 hours. The auto shut off functionality automatically switches the speaker off, if no signal is detected after a few minutes. Furthermore, the Charge 4 speaker features a convenient USB port that allows you to charge your mobile devices, such as smartphones, music players, tablets, and other devices. All the more, this JBL Bluetooth speaker has a premium build of high-quality materials and is IPX7 waterproof, so longevity is never an issue. Physical Features Key Features Waterproof powerbank 7500mAh 960g 5.5hrs charging time 3.5 mm audio cable Input Auto-power off 20hrs playing time Impressive Sound Quality Immerse yourself in the booming voice of this JBL Charge 4 Bluetooth speaker. It packs in dual JBL bass radiators that deliver robust, bass-thumping sound, giving you immersive listening experience. This high-end JBL speaker allows you to wirelessly connect up to two smartphones or tablets, as per your convenience. It also features a 3.5mm jack that allows for a wired connection with other devices. Furthermore, this speaker incorporates JBL Connect Plus technology that enables you to connect more than one hundred JBL Connect plus speakers for an amplifying listening experience. Incredible Battery Life Listen to music all day long with the powerful JBL Bluetooth speaker. It includes a rechargeable Li-ion 7500mAH battery that offers up to 20 hours of playtime on one single full charge. Moreover, this top-of-the-line JBL speaker needs 5.5 hours to get charged to its full capacity. Also, it has an auto power off functionality that automatically turns it off, if no signal is detected for some time, thereby enhancing the battery life. The USB port gives you a hassle-free way of charging your mobile devices such as smartphones, tablets, music players, and more. Portable Design This JBL Charge 4 Bluetooth speaker will make your on-the-go listening companion. The compact and lightweight build of this high-end speaker gives you the freedom to place it in your bag for effortlessly carrying from one place to another. So you can take this JBL speaker to the beach, park, or any place else where a group of people may want to listen to music together. Safe Design This JBL portable Bluetooth speaker is designed with safety in mind. It has a durable fabric and rugged material housing that makes it strong enough to outlast all your adventures. Moreover, this top class JBL speaker is IPX7 waterproof, so can easily take it to the beach or the pool for listening to music without worrying about spills or submersion in water.