Professional Chiropractic Adjustment Activator Correction Gun 4 Heads Impulse Includes: 4 heads 3 force adjustment settings ranging from 120 newton-480 newtons Metal carrying case The electronic trigger allows the delivery of singles thrusts or multiple thrusts. Pulling the trigger and immediately letting go will result in a single thrust. Holding the trigger will initiate the rapid thrust mode which will deliver 12 consecutive thrusts. Or during rapid thrust mode, if you release the trigger, the thrusts will discontinue. Last One Left!