Whether you are at home, at work, or traveling, you can take this deep-tissue Lithium-Ion™ cordless massager with you. Simply charge it up, unplug and its ready to use for up to 7 hours of use on a full charge! This handheld percussion massager can help with relief from muscle tension or pain in the neck, back, legs, shoulder, knees, spine, and feet. The percussive movement provides a deep penetrative pounding through the muscle to relieve the toughest deep down muscle knots. The variable speed dial allows you to choose the intensity that is right for you with higher highs and lower lows than the competition. It also comes with 4 massaging heads to use where you need them: Spine Head, Deep Muscle Head, Triad Head, and Flex X head. This kit has everything you need for at home muscle massage relief.