UTK technology has completely revolutionized personal heating products. Innovative infrared heating pad closely combination with ergonomically designed, Let your neck and shoulders obtain a better pain relief after sessions of use. Conventional pads only heat your skin and only a fixed position lying, while our unique pads with enhanced therapeutic benefits penetrate 200-300 times deeper into your body without exposure to electromagnetic radiation and free to change posture. This Healing Pad features far-infrared heat, negative ions. When the jade is heated, it emits far-infrared heat that penetrates deep into your body; the pad has the following benefits; relieves muscle and joint pain and stiffness/joint pain associated with arthritis/ muscle spasms/minor sprains and strains, reduces tension and stress <br><b>Specifications:</b> <br>1. Dimensions: 23.5 x 21.5 inch; and approximately 0.5 inch thick. <br>2. 40 Individual Natural Jade Stones plus 18 Tourmaline Stones for maximum heat transfer and penetration Held securely held in place on a 3.8 cm spacing layout <br>3. Actual jade stone area is approx. 10 by 14 inch; (but pad extends from edge to edge) <br>4. Power Cord: one cord 70 inch plugged into the electric use, the other cord 30 inch connected to the pad. <br>5. Wattage: 40 watts <br>6. Standard Voltage: AC 110-120 Volts <br>7. Actual Pad Weight: 1kg <br>8. Shipping Weight: 2kg <br><p> <b> Temperature Suggestion:</b><br>Warm-temperature range (103°F~109°F) for overnight using<br>Low-temperature range (110°F~119°F) for 3-4h sessions <br>Medium-temperature range (120°F ~129°F) for 2-3h sessions<br>Medium-High-temperature range (130°F ~139°F) for 1-2h sessions<br>High-temperature range (140°F~149°F) for 30-60 minute sessions<br>Very-High-temperature range (150°F ~159°F) for 30 minute sessions