120v Only. * Thumper's Sport Patented Drive System Technology Transmits Energy Deep Into The Muscle Tissue * Variable Speed Control From 20 To 40 Pulses Per Second That Match Your Muscles' Natural Healing Frequency * A True Speed Feedback System That Prevents Low Speed Stalls * Interchangeable Massage Spheres That Let You Customize Your Massage Experience * Long Ergonomic Handle Makes It Easy To Reach All Muscle Groups Neck Shoulders Back Legs * Easy To Clean Just Wipe With Damp Cloth * Hand Manufactured In Canada Ensuring The Highest Quality Product Specifications: Size: 16 L X 6 W X 5 H (40 Cm X 15 Cm X 13 Cm) Weight: 3 Lbs. (1.4 Kg) Fda Class 1 Approved Electrically Approved Ul Csa Ce Rohs 2-year Warranty (parts & Labor