Here is a smartphone case that lets you add speaker, power bank, and mount functionality to do more with your device. The Roxon smartphone case from Vibes Modular not only protects your phone but lets you swap out modules conveniently. You can use the VIBROX as a speaker to play your music. It runs for 12 hours.
The VOLTROX is a power bank for this system. It is available 3/6k mAh capacities. The VIBROX mount adapter allows you to mount your modules anywhere.[where to find it]