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: Rollers move in and out (depth) and at variable speeds to mimic human hands.
: These are generic model prefixes often used by third-party manufacturers or private-label brands sold on marketplaces like Amazon . For example, the
. Airbags located at the shoulders, arms, and legs inflate in sequence to squeeze away tension, making you feel completely weightless. 3. The 4D Experience: Better Than 3D?