This invention is a bag that opens down the center of its length and when filled, easily rolls up into a small package. Prongs of the device are movable between a retracted position and an extended position along two different travel paths by actuating the prongs or by actuating the carriage. As the pup learns, a charge in a housing is introduced to provide a simulated gunshot that expels a treat that trains the dog to feel excitement at the sound and smell of a gunshot. The information processing terminal converts the reception digital baseband signal into a reception data in synchronization with a clock, and a transmission data into a transmission digital baseband signal in synchronization with the clock. An apparatus for displaying correlated images based on anatomic triangulation. By adding the supplemental protocol to enable requests for missing data, a unidirectional transfer protocol that is not reliable is made reliable as a mechanism is provided to ensure receipt of the transmitted data.