3 in 1: The facial massager has three functions in one device, allowing you to enjoy comprehensive skincare treatment for the face, neck, and eyes. Skincare: The massager can help enhance the absorption of skincare products, which helps to increase the effectiveness of skincare applications. Vibration: The massager uses high frequency vibration to relax and revive the skin, which stimulates and tightens the skin, providing a strengthened and uplifted appearance. Tightening: The massager mimics muscle movements, providing facial toning and tightening that helps exercise the facial muscles, giving the skin a more youthful look. Curved: The facial massager is designed to fit comfortably in the hand whose ergonomic build comes in a curved inspired design, delivering a deep and stimulating massage to the skin. Item Type: 3 in 1 Facial Massager Battery: 1 x AA battery (excluded) Function: Massage of eye, neck and face This product requires the use of 1 AA batteries, the product does not come with batteries Rotate the massage head on the upper part of the host to install different functions of the massage head Rotate the lower part of the host, rotate to OPEN, battery installation/replacement, rotate to ON, power on, rotate to OFF, power off With the serum or skin care products to use better results