Before use, please charge the instrument and wireless remote control (otherwise, the instrument cannot work), and read the user manual carefully. The instrument has five modes:the first four modes stop after 5 minutes , and the Auto mode is 20 minutes.Ergonomic design, perfect fit to the contours of the face, meet all face shapes, and the length of the headband can be adjusted. The inside of the device is made of silicone material, which is more comfortable to stick to the face.You just need to wear it for 30 minutes a day while reading, sleeping, watching TV, or doing housework. Small and lightweight, it is suitable for use in the office, at home, on the go, and convenient for anytime, anywhere.