PTC ceramic heating drives this 17 inch tower, with selectable 850W and 1500W settings that bring a 250 sq ft room up to temperature quickly. The thermostat holds anywhere between 59 and 95 F, and 135 degree oscillation spreads warm air side to side rather than aiming it at one chair. Controls sit on the top panel or on the included remote, which works from up to 16.5 ft and takes one CR2025 battery, not included. Protection is layered: a V0 flame-retardant housing, overheat cutoff and a 30 degree tip-over switch. The polypropylene shell measures 7.5 inches across and 17 inches tall and weighs 4 lbs, so it moves from bedroom to office in one hand. A 71 inch cord reaches a wall outlet without an extension and noise stays under 50 dB.