Description: With 9 levels of strength intelligent adjustment, this massage pen can choose different strengths according to their needs, through bioelectricity penetrate the human epidermis for shallow stimulation points to open the meridians. With the ability to automatically find the point for precise physical therapy, and it can replace a number of different massage head, making it bring a different massage feeling. It is constructed of ABS material. The length of this massage pen is 18cm, the width is 3cm and the height is 3cm. The massage pen is suitable for health care. Item Name: Massage Pen Material: ABS Features: Button Operation, 9-position Adjustable, Pulse Cycle Battery Capacity 400 mAh Pulse Frequency: 0.01-300Hz Pulse Width: 100pS-320pS Open Circuit Output Electronic Pulse Voltage Peak: 0-360V Output Amplitude: 500 Load Voltage: 3.3V Size Details: L: 18cm/7.09", W: 3cm/1.18", H: 3cm/1.18"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Massage Pen 5 x Massage Pen Tips