What is an air duster？

 An air duster, also known as a compressed air duster or canned air, is a type of cleaning tool used to remove dust and debris from various surfaces. It consists of a canister filled with compressed gas, typically compressed air or a non-flammable gas like nitrogen or tetrafluoroethane.

 Air dusters are commonly used to clean electronic devices, computer components, keyboards, cameras, delicate instruments, and other hard-to-reach areas. They provide a focused stream of high-pressure air that effectively blows away dust, dirt, lint, and loose particles from the targeted surface without causing any physical contact or damage.

 To use an air duster, you simply hold the canister upright and press the nozzle or trigger to release the compressed air. The force of the expelled air dislodges and propels the unwanted particles away, leaving the surface clean.

 It's important to note that air dusters should be used in well-ventilated areas and according to the manufacturer's instructions. Care should be taken to avoid direct contact with skin, eyes, or sensitive electronic components. Additionally, some air dusters may contain chemical propellants, so proper disposal methods should be followed to ensure environmental safety.