Previous buyer from HOL changed her mind as the item was larger than she expected.
This 'cushion' is a folding plug-in item that will fit most chairs. It's several years old but has hardly been used. Although in perfect working order, the plug adapter has cracked and has now been taped.
It has a deep kneading movement, up and down the back, or can be held on a particular spot. It has 6 programmes, including full, lower or upper back, with adjustable width control and variable speeds - all via hand control.
Although this model is no longer available, the manual is still accessible online.
It won't have disappeared unless deleted, Yvonne. Check your HoL inbox.