The Trister Cordless Multi-Node Percussion Massager is designed to bring a soothing massage, closely mimicking a chiropractic treatment, to your home. Using percussive technology, it is specially designed to relieve tension in tired, sore, and tight muscles. The Trister Cordless Multi-Node Percussion Massager has four massage modes, three intensity levels, and comes with 5 interchangeable massage heads: Perfect for a massage to your back, waist, neck, and shoulders.