One roller set containing four massage heads provides a deep-tissue back massage.
Three modes of massage: "Auto" for the entire back; two manual modes message the upper back massage and lower back massage, respectively.
2 built-in vibration motors in the seat.
Ergonomically designed pillow, vented cushion surface, elegant appearance.
Optional heating function for this car seat (ST-105F).
Automatic timer: Automatically powers down after each cycle (15 minutes).