Safe for indoor use, this clean-burning, odor-free propane heater, is a great source of heat for any situation. Have a power outage in the dead of winter, and need to get warm? Have a hunting expedition, and need something for your hunting blind? This temporary heat source, can warm your feet, in no time! PROPANE NOT INCLUDED WARNING: This product can expose you to chemicals including lead and lead compounds which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information visit www.P65Warnings.ca.gov 4,000, 9,000, and 18,000 BTU/Hr Tank Capacity: 2 x 1# Propane Cylinder Swivel regulator and single control Hi-med-low heat settings Automatic low oxygen shut-off system (ODS) Accidental tip-over safety shut-off heats up to 400 square feet for up to 220 hours on low Fan (Operates on 4 D batteries or A/C adapter - both sold separately) CSA Certified PROPANE, Hose & Regulator NOT Included