Product Description(Battery not included) The intelligent pulse massager can take care of your neck at any time. Whether you get cold under the air conditioner or stay up late after overtime, it is your companion Low-frequency pulse electromagnetic wave is transmitted to nerve cells to improve blood circulation and relieve neck fatigue Before use, the cervical spine is sore and stiff due to long-term head lowering or sitting still After use, relax muscles, promote blood circulation, and no longer stiff Specifications Using Time:150min Package Include1pc*Massager Note: Due to different personal measurement methods, there will be an error of 2-4 cm, please understand Thanks for your support