This neck cooler features both heating and cooling functions, and is equipped with RGB lights. I purchased this item new and used it a few times. (The blacked-out area on the lower right corner of the outer box was marked with a marker from the time of purchase.) I have confirmed that both the heating and cooling functions work without issue. I have also disinfected and cleaned the item. - Brand: Joyhouse - Model: LB02 - Features: Heating and cooling functions - Color: Black - LED Display: RGB lights No claims and no returns accepted.