A pocket-size device, the Stimulator is shaped something like a rocket with a plunger at one end and knob at the other. Pushing the plunger activates two crystals that create a tiny burst of electricity - which feels like a pinch - that the device's creators at Natural Choice Pathways say will relax muscles and stimulate the production of endorphins, the body's natural pain killers.

It's not recommended for those with pace-makers or nerve weakness.

Since the Stimulator debuted in 1993, nearly 1 million have been sold, and for some reason, Hawaii residents are some of its biggest fans, said Bob Hartshorn, national sales administrator for the company.

Athletes are also fans of the Stimulator. Keith Jones, the 1986 World Champion arm wrestler, says he won't work out without it. "If you have a stiff neck, it fixes it. It looks funny but it works."

Jones ordered the device after seeing it on an infomercial. "The person who really sold me on it was Evel Knievel, 'cause he's been through every accident and broke every bone in his body."

Dr. Wes Young, a specialist in emergency and occupational medicine who writes a health column for the Star-Bulletin, says that for minor injuries of known cause, electrical stimulation devices can offer temporary relief. But he cautions that those with severe or prolonged pain should get a doctor's opinion. He said that although the devices are generally not harmful, reliance on them could delay treatment of more serious conditions such as diabetes or herniated discs.

The Stimulator requires no batteries or recharging and sells for $79.80, plus $8.50 for shipping and handling. It comes with a money-back guarantee. To order, call 1-800-728-0815.