Indoor safe heater that generates its own electric power. Great for heat, charging, and light (power outages, ice fishing, hunting blinds, remote areas). On-board thermo-electric generation. USB (universal serial bus) port to charge cell phones and iPads. Runs a row of LED (light emitting diode) lights on the handle. Safety features include oxygen depletion sensor and tip-over safety switch. Runs on 1 pound propane cylinder or 20 pound propane tank (not included).