Description of DryGuy Circulator™ HDT Boot Drier Hybrid Drying Technology is a patented Ram-Air ventilation system. HDT was developed utilizing Wind Science principles to blend Ram-Air Induction with the thermal convection philosophy. Fresh air enters the Rear Air Intake, is forced over the thermal heating elements with a powerful CPU fan and vents warm air all throughout the toe box removing wetness or warming chilly boots or shoes in a fraction of the time. Features: Powerful “CPU” Fan Perfect for warming and drying Automotive or Home Drying Compact, portable packs easily in boots Will not damage footwear, boot liners, or foot bed Eliminate unpleasant odor Model - DG00301 Weight - 1.3 lbs. Heat - Warmed to gentle temperature Dimensions - 6.5 L x 2.5 W x 2.25 H Power - 12-Volt DC/110-Volt AC Warranty - One year