Benefits: ?Far Infrared Heating: PHYMAT infrared amethyst heating pad emits Far Infrared Deep Impact Heat which penetrates the human body up to 6 inches deep into the body?warm the body inside The increase of heat energy in the body is helpful to promote blood circulation; promote muscle relaxation and relieve muscle cramps; promote metabolism; promote fat tissue metabolism, burn decomposition to help lose weight. ?Negative Ions:The gem filled in the far infrared pad can release natural negative ions when heated. Natural negative ions can purify the air, improve your breathing environment, and make your breathing more effective. In addition, negative ions also help to relieve fatigue and improve sleep. ?Hot Stone:This far infrared amethyst mat includes natural Amethyst, Obsidian,Blue Agate,Green Aventurine,Yellow Aventurine,Red Jasper. Natural gemstone can better store heat and reduce heat loss. So it can provide better heating and heat preservation effect. Adjustable Temp: ?Warm: 30-40 °C (86-104 °F) for overnight use ?Middle: 40-50 °C (113-131 °F) for 2 hours or more ?High: 50-60 °C (131-149 °F) for 30-90 minute sessions ?Very High:60-70 °C (149-158 °F) for 30-60 minute sessions Please Note:When you set the temperature range (50°C-70°C). You need to cover the surface of the mat with a blanket. Specification: ?Size: 67? x 27" ?Gemstones:Amethyst,Obsidian,Blue Agate,Green Aventurine,Yellow Aventurine,Red Jasper. ?Voltage: USA power 110-120V, 240W. Package: ?1*Heating Pad ?1*LCD Digital Controllor ?1* Travel Bag