Opened once, almost unused. It seems it's meant to be used without covering the heater with cloth, and my pet couldn't use it. Purchased last season. No instruction manual. There are very slight marks from a magic marker on the surface and the bottom of the back (see photos). ☆Please understand this is stored by a private individual☆ Manufactured by MARUKAN Co., Ltd. Far Infrared Hot Heater Mini Size For very small dogs and cats Size: W230 x D160 x H14.5mm Low power consumption: Approximately 1.8 yen for 8 hours Reversible: Warms up firmly at 38 degrees Warms gently at 30 degrees. Washable for easy cleaning and odor removal. Covers the entire cord. L-shaped plug. Stain-resistant surface.