In RANGE, Knee heating pad is provided with built-in snap on-off cut outs which helps in maintaining the temperature of the heating pads. A dipole switch having option of 0-1-2 is provided with the heating pad to regulate the flow of voltage. * A revolutionary way of HEALING: it's a NEW COMFORT CONCEPT * Take a second to imagine to RELAX on slightly heated surface in chilling winter. How relax you are going to feel ? * Most Convenient and economical way of keeping a person warm * Very Useful for Arthritics/Old Age Pains. * With three temperature settings : Low/Medium/High(1-2). * Two built in Thermal cut outs for 100% Safety. * Teflon Coated Wiring for protection against overheat. * LED Indicator for Clear Viewing. * Even Distribution of Heat. * Water Proof Element. * Long Lasting Heating element. * Well insulated on either side for complete safety and comfort.