Features Specifications:Sell Massage for Waist and Back Massage for Waist and Back Model: M-MM1092 Product Functions l Massage points of waist and back. Improve blood circulation and remove ache l Clear channel and circulate blood  l Relax pressure and remove fatigue Product Features l Four emulational massage knobs l Ventilative with good elasticity, soft and comfortable l Positive and negative bidirectional kneading mode