... polyster(back)stuffing:memory foam* 5 built-in virbating motors massage 4 tagert position of neck, shoulder, back and thighs * ... 8 buttons,4 for massage positon adjustment ,1 for mode,1 for speed choice of 3 vibration intensity ,1 for heater,1 for power on/off ... with PP foam *includes 12V DC adaptor for home, office using *power automaticlly shut off after 20 minutes massage comfortable mattress