Specification Dimension (L×W×H) (inch) Dimension (L×W×H) (mm) Package Dimension (L×W×H) (inch) Package Dimension (L×W×H) (mm) Weight (lb) Weight (g) Package Weight (lb) Package Weight (g) Item No. Specification 43.31×16.14×2.76 1099.1×409.9×70.1 26.77×5.90×16.53 680.0×149.9×419.9 6.64 3010 8.53 3870 ZHUMI-AMD-Z01-GY Back Deep Kneading Back Nodes : Vibrating Heating Pad for Back! This back massager has 4 deep-kneading nodes that move up and down to relax your entire back. It offers 3 massage zones to choose from: full back, upper back, or lower back Adjustable Massage Nodes: Fits Body Curves for Comfort! The massager’s nodes are adjustable, reaching up to 6-7mm in height to fit your body’s curves. 3-Level Vibration Seat – Heating and Massage Pad! adds a 3-level adjustable vibration function to the seat, delivering gentle comfort to your hips and thighs. (Note: The seat only has vibration—no heating.) Back Cushion Heating – Heating Pad with Massager! The built-in back cushion heating warms your back while relaxing muscles in your back, waist, and shoulders. It pairs seamlessly with the kneading nodes (you can use heat alone too!) and fits the bill for a cozy massaging heating pad. Usage Precautions：If the following situations exist：during pregnancy, recent injuries, thrombotic diseases, inflammation, swelling, or cancer, If you rely on electrical medical devices such as pacemakers, Consult a doctor before using the massage seat cushion for treatment of any ailments or illnesses.