Type A is a small box, type B is a large box, and type C is a professional box for outdoor use. ^^ Features of A and
B: with shock absorbing pad inside, suitable for loading small and miniature electronic devices. It can well protect the internal equipment from being cut by rocks in the field, and it is waterproof, shockproof and dust proof. ^^ Type C is a case that can be competent in any environment in all weathers, it is easy to use in outdoor activities. ^^ Using impact ABS and other accessories, the overall solid and opaque design effectively prevents light penetration. ^^ Specially designed to place and protect equipment, instruments or other objects, type C is effectively and from external dust or