Concrete wireless charger is a new electronic device for all Qi compatible devices. And there are different kinds of material for the case, such as plastic, bamboo, wheat straw even concrete which is newest material for mobile wireless charger now. The concrete is a destructive material on Earth as you know. Now we have case made from concrete for 10W wireless charger. The top side for wireless charging is made of different material, such as PU, cork, bamboo, fabric. And the charger body is made of concrete. There are 4 colors of white, black, orange and grey, and in round and square shapes. The concrete charger can be in smooth or with porous holes for the case surface.