This item seems to fall in the realm of quack medicine.

Evidently, in 1936, for $8.50, it was possible to purchase  electrical home therapy for various health issues.

The wood box is  solidly built with mortise  and tendon joints. The  carrying handle and box closures are attached well.

The box shows the type of wear that one would expect from an item that might have been used by many people for multiple promised cures.

The box opens from the top and the bottom, and it includes the accessories you see pictured.

This certainly is an interesting conversation piece!