Easily add an audio jack to your iPhone with the AudioMod iPhone Audio Jack Battery Case. Featuring a built-in 3.5mm headphone port, you can plug your favorite headphones into your iPhone again when using the AudioMod. Plus, you can listen to your music and charge your phone at the same time. The AudioMod also doubles your battery life, offering an extra 65 hours of music playback and 36 hours of talk time. Likewise, you can enjoy 18 more hours of video playback and 20 more hours browsing the web. The case comes with a 3200-4600mAh battery backup that automatically switches to power-saving mode once your phone reaches full charge. Furthermore, the AudioMod case is compatible with all headphones and corded remote functions, offering premium 24-bit high-resolution audio quality. Finally, the AudioMod features a slim and lightweight design that also provides extra protection.