The 3-in-1 Heated Neck Massager with Remote uses vibration, low-frequency electrical impulses and Far Infrared Ray (F.I.R.) heat to soothe and restore your tired and sore neck muscles. It adjusts to fit neck sizes 9.6″ to 23.8″, and features automatic and manual massage modes. The vibrations, electrical impulses and heat can be used separately or in any combination… you control the settings and intensity with the wireless, backlit remote. Use it while you’e working, walking or watching TV. Note: Not for use by those with a pacemaker.