A rail for suspended conveyors and suspended cranes, having a substantially C-shaped profile head for suspending the rail and a profile body connected thereto. In one implementation, a bird feeder includes a reservoir having a wall defining an interior. After the authentication processing is complete, the microcomputer sends to the equipment body information to be used in updating the battery residual quantity count executed by the equipment body. The central computer communicates with both the regional server and the recipient computer.