A spinal cord stimulator (SCS) device is surgically placed under your skin and sends a mild electric current to your spinal cord. A small wire carries the current from a pulse generator to the nerve fibers of the spinal cord. When turned on, the SCS stimulates the nerves in the area where your pain is felt.
The main advantage is that a trial phase of this device can be done prior to be implanted to verify if the type of pain being experienced by the patient will respond once the permanent implant is being done.