A dust-collectable mobile robotic vacuum cleaner includes a base frame, a driving device mounted to the base frame, a control device mounted to the base frame and electrically connected with the driving device, a collision-detectable unit mounted to the base frame electrically connected with the control device, and a dust-collecting device mounted to the base frame. Each of the piezoelectric elements has a length extending in a direction generally perpendicular to the stacking direction. A pair of energy absorption straps engage the column support bracket and the lower bearing adapter and resist further forward movement of the lower bearing adapter. When the selected character is changed in a first change step, the position of the virtual camera is moved in accordance with the position of the newly selected character. In a subsequent transaction, such as where a customer changes telecommunications provider, the customer voice print is used to verify that a voice approval given by the customer is in fact from the customer.