Electric Cervical Neck Pulse Massager Body Shoulder Muscle Relax Pain ReliefIt promotes regional blood circulation, relax regional muscles, eliminate inflammation, swelling, pain and fatigue. Cervicodine has a good effect on shoulder and arm numbness, headache and dizziness.Specifications:Application:NeckMaterial:ABSItem Type:Massage & RelaxationPackage size:22.5X20X5CMElectric impulse frequency:0-1000HzElectric impulse width:20-400sPulses frequency:0Hz - 1000HzPulse width:20us -400usPower:3VDC30mAWith 6 kinds of modeWith 16 kinds of strengthMain function: using electronic pulse massager to relax neckPower supply: 2 x AAA dry cell(not include) Can use 7 hours continuouslyFeatures:Effective Neck Massager: The electric neck massager use of low-frequency electrical pulse simulate real human massage ,to help relieve neck soreness, improve sleep quality and promote blood circulation.Multiple Mode: The electric neck massager builds up with heating , 3 vibration patterns,15 intensity settings . you can choose the most suitable mode you need to reduce muscle pain or body tension. The massager is pre-set at 15-minute auto shut-off.Portable and Fashion: With the unique headphone style, this cordless neck massager fits any size of neck. It's portable designed and lightweight, great for home, office&car use.Comfortable to Wear: Skin-friendly, breathable soft silicone material, no pressure on the neck artery; Ergonomic 3D designed, fits the physiological curve of the neck. The circular traction function gradually adjusts the cervical posture.Long Battery Life: The buit-in 1600 mAh rechargeable lithium battery of this 3D neck massager with standard Micro USB connector effectively prevent overcharge and over discharge and provide 4 hours use for once charge.Package:1 x Neck Massager Machine2 x Massager Pads1 x Wire