Size: 4-button type, 6-button type Size Description: *The actual size may have slight variations due to measurement with a tape measure. Material: PU, ABS, Sponge Colors: Red, Gold, Black 4-button type / 6-button type Infrared heating function, gently warms and makes your feet feel toasty. With infrared heating function, it relieves pain and muscle tension, facilitating massage. Offers three different levels of intensity. Ten large and small kneading balls are placed on the left and right soles, achieving a sensation like a hand massage. Easy to operate, and its compact size makes it a popular foot massager that doesn't take up much space.