The Wahl Deep Tissue Percussion massager provides all-around and targeted muscle relief, even deep down, to speed healing or fitness recovery to support an active lifestyle. Percussion is the ultimate massage experience providing fast comfort by disrupting pain signals, increasing local blood circulation, blocking neurotransmitters, and may help decrease inflammation and increase oxytocin levels. All of these allow muscles to relax, reducing feelings of tiredness and pain. Deep kneading therapeutic massage helps relax and relieve muscle tightness all over your body. It has a combination of superior power-- up to 3, 500 pulses per minute and four interchangeable heads for customized pain relief. Variable intensity control allows you to dial in from a gentle relaxing massage to a deep invigorating massage and everything in between depending on your condition or need. Equipped with 4 customizable massage attachment heads to ensure relief. The innovative Four Finger Flex attachment has four finger-like nodes to replicate a masseuse's hands. The acupoint attachment head pinpoints deep into the tissue to break up knots. The Deep Muscle rounded attachment head is smooth to create a gentle, relaxing massage for all body use. The Flat Disc attachment is extra wide to provide a larger surface area for widespread vibration to cover large areas. Note: The massager has a temporary stall force of 22lbs – if this pressure is applied the massager will stop movement to prevent overloading the motor, that does not mean the massager is broken. It will resume function once it is turned off and then back on again. The product in the packaging may not be exactly the same as in the photo due to continuous improvements to the product. We have updated the internal components in March of 2023. FDA registered medical device.