Reduces stress on the skin with approximately 100 sonic vibrations per second. This is a set of 5 T-shaped replacement blades. The blade on the main unit shown in the image will be removed, and the 5 new replacement blades will be sent. For forehead, cheeks, arms, legs, etc. The blades are made in Japan. There is some slight soiling on the replacement blade packaging. Please prepare one AAA battery.