An adjustable armrest wood frame PU office chair typically has the following characteristics:

Adjustable armrests: The chair's armrests can be adjusted in height to provide comfort and support to the arms while working. This feature allows the user to customize the chair to their needs.

Wood frame: The chair's frame is made of wood, which gives it a natural and elegant look. Wood is also a sturdy and durable material, which makes the chair strong and long-lasting.

PU upholstery: The chair's upholstery is made of Polyurethane (PU), which is a synthetic material that looks and feels like leather. PU is easy to clean and maintain, making it a popular choice for office chairs.

Swivel base: The chair's base can rotate 360 degrees, allowing the user to turn and reach different areas of their workspace without having to get up from the chair.

Adjustable height: The chair's height can be adjusted using a gas lift mechanism, which allows the user to raise or lower the seat to their desired level.

Tilt function: The chair may also have a tilt function, which allows the user to recline the chair back and relax, taking the pressure off their back and promoting good posture.