trimmer clipper was invented in 1919

Manual trimmer clipper have existed for centuries but are no longer popular in Western countries. The electric hair trimmer was invented in 1919 and is much preferred to the manual version for its speed and ease of use.
small hair trimmer themselves are electrically operated machines, most with a power cord. Some models are cordless, using a rechargeable battery as the power source. The trimmer contains a motor inside a plastic handle that is insulated to prevent overheating of the unit. The motor moves very small blades against each other quickly in a side-to-side motion. This motion cuts the hair. Most blades are made of stainless steel, although ceramic blades can be found. Many trimmers have adjustable blades, while others depend on attachments to create different hair lengths; some offer both options.