Tested and works. No idea the age of filter. I would replace it.

This Holmes HAP9243 air purifier is a must-have for any home or office space. With its HEPA-Type filtration technology, it captures and removes up to 99% of airborne particles, including dust, pollen, and smoke. The purifier comes in a sleek black color and has three speeds to choose from for optimal air cleaning.

The tabletop design and electric power source make it easy to use and move around as needed. This model, which is made by Holmes and is part of the Aer1 line, is in excellent shape and is sure to provide you with clean and fresh air.