Spine Instrument Spine Massager( ) The product is shipped based on the color or size of the main image of the product page. Spine Instrument Spine Massager Physi apy Instrument Home Electronic Pulse Shoulder Neck And Neck Massager( ) Feature: 1. 3D smart fit technology, easy to adjust the electrode according to your neck curve, more comfortable to use. 2. Relieve neck muscle spasm, relieve pain symptoms, adjust and restore the damaged internal and external balances of cervical spine. 3. 6 massage modes and 9 speed adjustments, meeting different demands. 4. Built-in healthy magnets balancing the autonomic nerves, increase oxygen carrying capacity, improve the nutritional status of cell tissues, and exert a variety of healthy effects. 5. Including body massage patch, can be used for leg massage, arm massage, lumbar massage, etc. : Condition: 100% New Item Type: Vertebra Massager Material: ABS : 2 AAA batteries (Not Included) Pulse Frequency: 1-1000hz Pulse Width: 20-400us Rated : Up To 2.3w : Red, Package List: 1 x Vertebra Massager 2 x Patch 1 x Connecting Cable 1 x