Powered by one small and lightweight Rechargeable Lithium Ion Battery weighing only 173g .
Amazing heat - heat panels front and back - 45c for 2.5 hours on full power!
Five sizes: S, M, L, XL, XXL.
Adjustable heat levels using Star-trek like 'beam-me-up-Scotty' tri-colour push-button on chest: red, amber and green. See pictures below in Image Gallery.
Battery lasts 2.5 to 4 hours, in continuous use, based on which setting you use and can be recharged 500 times before replacing.
Hand wash, don't tumble dry.