Our recently formed company Massive Dynamic LLC, is creating a product that iPhone 7 users can't go without. The Apple iPhone 7 has some drawbacks to many consumers, the missing audio jack, the inability to charge your phone and listen to music at the same time. Not being able to plug your iPhone into your car because of the missing jack. That is why Massive Dynamic wants to create a solution for you and many others.The solution is our SentinelAcustic iPhone 7 cases. Our cases will power your device to keep you charged throughout the busy day with our slim 2000mAh battery added to the back of the case. On top of that, it will also give you two of the scarce lighting connectors to let you charge up and or listen to music at the same time. This will allow you to use both your charger and the headphones that Apple was so kind to provide. Now what if you lose your earpods or have earphones you already love, what if you want to share music but all they have is an aux cord? Well that's where the added 3.5mm auxiliary jack comes into play. We are working hard on adding a 32bit DAC into the case for the 3.5mm jack to give something more than just a jack! SentinelAcustic gives you all three solutions to the iPhone 7 dilemmas, two lighting ports, and one 3.5 jack, plus so much more!