Encased iPhone 7 Plus Battery Case with 3.5mm Headphone Jack - AudioMod Power Charging Case (2018) Charge anywhere, listen everywhere. The Jack is Back! Time to say goodbye to all your dongles, cables and adapters. The AudioMod features a built in 3.5mm headphone port. Go ahead and grab your favorite pair of earphones because their back in business! All day power comes courtesy of the powerful 4100mAh li-polymer battery with "Power Reserve" allowing you to power up anywhere with the simple click of a button Great features include a four stage LED power indicator and a passthrough-sync enabled chipset allowing seamless sync compatibility (Please note: due to the constraints of the internal battery, the case is not compatible with wireless charging) Every AudioMod case is backed by a 5 Year MFR Warranty.