Model Number: GH-ZY52451 Brand Name: Ningbo GH Key Specifications/Special Features: Turn your walk into a full body workout. Target hard to reach back of arm fat. Tones, firms and sculpts full body as you walk.Strengthen and tone arms, shoulders and core, all as you walk. Easy on joints and tendons and is a low impact workout with hi impact resultsUnique design creates more resistance and forward momentum vs. regular weights.Balanced weight intensifies arm swing for enhanced workout. Works out arms better than regular dumbells or walking weights.Patent pending design is unique and innovative. Low weight is comfortable for long walks. User controls intensity of workout, simply pump arms harder to increase resistance and for a harder workout.