"This is a disposable chair with features it can't meaningfully support."
The 'USB massaging lumbar cushion' is a simple vibrating pillow that needs to be plugged into a USB port. It is not an integrated, powerful massager and provides a low-intensity buzz rather than targeted pressure relief.
This chair is for buyers whose only priority is the absolute lowest price for a racing-style seat with a footrest. It is a temporary solution for a child's room or for someone who needs a chair for very infrequent, short-term use.
Anyone planning to sit for multiple hours daily should invest more. The non-adjustable armrests, gimmick massage pillow, and questionable build quality are unsuitable for proper ergonomic support during work or long gaming sessions.