Disclosed is a pneumatic pressure and vacuum device that allows a user to adjust the duration of either pressure or vacuum that is applied to a pneumatic adult toy. A solenoid valve is used that is controlled by a solenoid for opening and closing ports that apply pressure and/or vacuum to a pneumatic adult toy. A timer is utilized to independently control the on and off times of the solenoid valve, so that vibrational frequency, as well as the amplitude of pressure and vacuum can be adjusted.