An airbag cushion has two chambers to permit the front chamber to inflate less rapidly than the back chamber for cushioning the head of an occupant in a vehicle with less force than the chest of an occupant is cushioned by the back chamber. A method includes controllably applying energy to a bone cement volume outside of a patient’s body to selectively accelerate the polymerization rate of the bone fill material volume prior to introduction into a bone. The guide assembly is movably received through the first installation portion. A decoding device is connected to the audio output interface for receiving the audio signal and controlling the external charging power supply to perform the charging operation or to stop the charging operation on the electronic device. A transfer device is connected to the supporter.