1.Vibration provided through five motors seted inside. 2.To promote blood circulation and release fatigue from long sitting. Operation Instructions 1.Connect transformer with power 2.When Press""ON/OFF"",the indicator light is on and the cushion starts working automatically 3.This cushion has 4 modes.You can choose different mode by pressing ""MODE"" button 4.Press""SPEED"" to adjust the working speed based on your choices 5.Press""INTENSITY"" to adjust the working frequency.The frenquency has 3 classes and can be chosen according to your need 6.Press""ON/OFF""again to stop working Cautions: 1. When cushion is at rest status , the power wire should be put out from the power source; 2. Should not step on or press by heavy matter; 3. Should not use water or other causticity stuff to wash the cushion; 4. Shut out the power source first if any abnormal situations occurred, should not fix or change the power transfer by yourself; 5. Turn off the cushion before put out the power plug. "