Doggy Man Far Infrared Heater 2-way Design Perfect heater for dogs and cats! Set of 2!! These were used, but are in very clean condition. There are no scratches or bite marks. Both come with warm covers. The covers have been washed, but please understand that I may not have been able to remove all the dog hair. (The covers are still in good condition.) Both are 2-way... The strength varies depending on the side of the heater. Although they are in relatively clean condition, please understand that they are used items. - Model Name: Far Infrared Heater L - Power Source: AC power - Suitable for: Medium-sized dogs, small dogs, and cats - Type: 2-way design Thank you for looking.