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