A multi-purpose solar power safe walker for a user having waist or knee problems, in which a support is attached to legs, and the legs have wheels with an elastic member embedded in the legs. The solution includes sodium citrate, a combination of sodium biphosphate and sodium phosphate dibasic, adenine, and mannitol. Types of buffered group traffic include multicast data, broadcast data and both multicast and broadcast data. The longitudinal axis of the cylinder running path is offset relative to the first spatial axis. A noise countermeasure information determining unit determines noise countermeasure information based on an item selected by the user from the noise countermeasure list information, and transmits the determined noise countermeasure information to the user terminal. The system further includes a switch that is electrically coupled to the first terminal.