(11" x 5 1/2" x 2 1/2") - Massaging action relieves tired, aching muscles. Enjoy a neck and shoulder massage while sitting, working or resting. Revive tense, tired muscles. Invigorates you to make it though the day! Relax tired, sore muscles after a workout. Perfect for home or office. Can be used on you back, neck, legs or arms. Two massage modes: Alternating vibration creates a wave-like motion, or dual motor massage for a constant vibration.