An explosion proof assembly that includes a first portion with a window; an outer touchscreen coupled with the first portion to occlude the window; and a second portion releasably coupled to the first portion. The second portion has a second portion inner surface. The assembly includes a mobile device operable via a mobile device touchscreen. Upon assembly, the outer touchscreen is transmissive to the mobile device touchscreen. The explosion proof assembly has a sound material therein having a porosity of between about 10 microns to about 30 microns.