The little buddy is a 3,800 BTU portable, indoor safe radiant heater for a space up to 100 square feet. It uses a one-button ignition/on functions. Safety features include a tip over switch that will shut the heater off if it gets knocked over and a low oxygen sensor that shuts the heater off when oxygen levels in the room get too low. The pilot design will also shut the heater off completely if the pilot light goes out. This heater will run for up to 5-1/2 hours on a one pound cylinder. Clean burning and nearly 100% efficient. CSA approved and factory tested with a one year warranty. Tank not included.Mr. Heater F215100 MH4B “Little Buddy” 3800-BTU Indoor-Safe Propane Heater w/ Propane One Pound Tank Refill Adapter