Features: brand new and high quality Freely adjust the massage intensity, through the setting mode, the massage intensity. There are 6 levels of massage intensity, which can be adjusted according to your own comfort. TENS micro-electric pulse massage uses bionic micro-current pulse simulating massage techniques to relieve muscle discomfort. Continuously and gently stimulate nerves, muscles and cells, activate muscle vitality, and achieve a soothing effect. Lightweight and compact, you only need to stick it on the cervical spine and start the massage when you use it, without affecting your work and daily life. The mini compact can be carried with you, travel, travel, and home, making massage easier. For battery models, open the rear compartment cover and insert two AAA batteries to enjoy the massage for time. (The battery is not included) Package Includes: 1 Set of Wireless Massager Specifications: Material: ABS Color: As The Picture Shows Type Optional: Rechargeable/Battery-powered Size: approx.13.5x6.2cm/5.31x2.44in note: Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!