4-head massage system with rotating heads in pairs for comprehensive coverage 4D massage heads designed to simulate the sensation of hand massage, especially effective in the neck area Spot function allows targeted massage on specific areas Offers 2 adjustable intensity levels for customized comfort Height and tilt of the neck area can be easily adjusted for optimal positioning Simple operation with a manual control switch for user-friendly use Ergonomically shell-shaped seat for added comfort during use Compatible with all seats that have sufficient seat depth and a backrest Solid back cover provides stability and durability