TDP Therapeutic Lamp features a plate coated with a proprietary mineal formation consisting of 33 elements. TDP lamps has successfully treated up to 60 million patients in China. When heated by as electric heating element, this mineral plate emits a special band of electromagnetic waves in the infrared range of 2 to 25 microns in wavelength and 28 to 34 mv/sq.cm in intensity. In clinical applications in China and other Eastern Countries for over 15 years, the TDPlamp has proven itself to be effective in treating ailments such as chronic wounds, joint pain, arthritis, back pain, injuries and some skin conditions like herpes and psoriasis etc. TDP lamp has been widely used for more than 100 ailments. Available Two Sizes Heads, Regular, JCQ-27 or Oversized Heads (30 % larger), JCQ-29 Built-in manual timer Mineral Plates (lasts up to 1500 hours) 110 volt, 250 watts Adjustable multi-position head Minimum treatment distance 12" Moving wheels base easily even on the carpet 90 Day Warranty – Parts & Labor (shipping charges not included)