Mr Heater's indoor safe propane Buddy Heaters have become America's Most Popular Portable Heaters; Buddy heaters can deliver heat during power outages, natural disasters, in garages, barns, cabins, workshops, hunting blinds and deer stands; Swivel regulator and single control; Hi-Med-Low heat settings; Automatic low oxygen shut-off system (ODS); Accidental tip-over safety shut-off; Fan (Operates on a 4 D batteries or A/C - both sold seperately); Runs off a 1lb cylinder, connects to a 20lb Cylinder with opt...