Rechargeable battery operated far infrared fir heating pads series / heated body wrap / heating moist pads. Relieve pain ~ arthritis / chronic pain / sports injury / treat sports injuries / soothing heat / boost immune system Heating pad ~ far infrared fir heating pad series / far infrared heat padding / rechargeable battery operated heating hot packs Battery configuration 1) ni-mh batteries DC 4. 8v / 2000mah High capacity & long cycle time with no memory effect rechargeable ni-mh batteries Fir heating element DC 4. 8v / depends on heating part dimension and application (with water proof membrane) Charger unit Input: AC 100v ~ 240v 50 / 60hz Output: DC 6v, 700mahce, tuv, UL, cccapproved 2) li-on battery DC 7. 4v / 2200mah High capacity & long cycle time with no memory effect rechargeable li-on battery Fir heating element DC 7. 4v / depends on heating part dimension and application (with water proof membrane) Charger unit Input: AC 100v ~ 240v 50 / 60 hz Output: DC 8. 4v, 1. 2ace, tuv, UL, ccc approved 3) dry cell alkaline batteries DC 6v / 2000mah Features includes: Forehead cover, eye cover, neck support, shoulder support, arm support, elbow support, forearm support, wrist support, abdomen support, waist support, thigh support, knee support, shank support, ankle support, single heating pad Every single heating pad works individually Technical data Uses ultra-thin, flexible and super-conductive heating element Uses AA dry cell battery (alkaline) or rechargeable battery Heats up quickly low power consumption Uses comfortable, elastic neoprene material