Nexpaq

This is a smartphone case which is equipped with a battery of 1000 mAh and it has a six compartments with plug-in modules to perform the different functions. The nexpaq has a 12 modules which is the battery power, the active loud speaker, the LED flashlight, the SD card reader, the temperature and humidity sensor, the two programmable hardware buttons, a 32 or 64 gigabyte USB flash drive, an air analyzer, a breathalyzer, a laser pointer, 64 gigabytes of backup storage and the dummy module.

The smartphone and the modules communicate by a via bluetooth. This device is the first and the only modular technology that can be swapped between android phone and iPhone. A user can choose a case with four modules which is includes the battery, buttons, a card reader and a loudspeaker and it will cost a little bit higher but I'm pretty sure that this device is worth it to use and you'll not regret it. The user can also independently choose the modules they want and the price will depends on each modules that you want.