Introducing 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. Troubleshooting Tips: 1. Make sure that before use, customers are fully charging the battery. There is an included USB-C cable for charging that is in the accessory pack along with the quick start guide 2. Please make sure customers have the latest software and version of Bluetooth downloaded to their device 3. Bluetooth performance and connectivity can vary based on the environment in which it is being used. For best performance make sure that there is minimal interference (doors, walls, etc) between this speaker and the device transmitting Bluetooth 4. On the back of the speaker there is a USB-A connection that customers can connect their device to in order to use the CHARGE4 as battery. This would be the charging port 5. Quick Start Guide attached for your reference