This delivers targeted percussive therapy to relieve muscle tension,improve blood circulation and accelerate post-workout recovery, their compact,travel- friendly design makes them highly effective for relaxing tight knots and easing soreness,wheather u are at the gym,the office or at home,to safely use it,firmly press and hold the power button to turn it on,start on the lowest speed en gently float the device across the meat of yo muscles in slow-sweeping motions for 15-30 seconds per spot,DO NOT SPOT DOWN AGGRESSIVELY OR USE IT ON BONES,we deliver to yo doorstep.