A device (2) for dispensing a fluid comprises a housing (4) having an internal power source and a mounting assembly adapted for receiving a replaceable fluid reservoir (6). The fluid reservoir includes a capillary element for movement of the fluid to a discharge end thereof. A mechanism is disposed within the housing and is energized by the internal power source for vibrating a perforated discharge plate disposed adjacent the discharge end of the capillary element. The mechanism provides sufficient vibratory movement in a dispensing state to pump the fluid from the discharge end through the discharge plate and into the atmosphere. A control (8) is carried by the housing and is disposed beneath the mounting assembly. The control provides an interface for a user to select at least one of a timed mode of operation, an automatic mode of operation dependent upon a sensor output developed by a sensor (5), and a manual mode of operation. The mounting assembly is further adapted to receive the replaceable fluid reservoir in a manner that allows same to be visually inspected during an in-use condition.