Can easily adjust the electrode according to the neck curve. help you relieve pressure and become more comfortable; Electric massage stimulates your blood circulation and relax your muscle of the covered range.Electric pulse massage simulation of traditional Chinese medicine a variety of massage techniques to promote blood circulation, relax the local muscles, electrode pads designed to achieve double massage effect.2*AAA battery (no include); Physiotherapy time: 15 minutes, can precisely control the temperature range to avoid excessive heat. That you can maintain your cervical vertebra anytime, anywhere, without worrying about power problems, it is more suitable for travel and outdoor walking.