[Smart Display of Exercise Data]Home exercise equipment provides unique smart counting function. When you exercise, you can clearly see how many times you it, how long it took, how often you exercised, and the approximate calories you burned. I believe it will greatly increase your interest and desire to exercise.[Infinitely adjustable resistance] There are three power selection ranges, 22-66 lbs, 67-176 lbs, 177-400 lbs. According to your own ability, adjust and choose the resistance that suits you, , gradually strengthen, and challenge the limit. So, great workouts for adults at different , whether you're a novice or [Unique Double Spring Design] The inner and outer double springs are set together. Inner coil springs add movement pounds for more efficient movement. The outer coil spring ensures the difficulty of the exercise and makes the exercise more effective. At the same time, the rebound is smooth and not stuck, making the movement [High-quality thickened carbon steel] The overall material is made of high-quality carbon steel, thickened and widened, physical engineering design, stable and compressive. At the same time, the non- handle made of rubber and the safety rope made of high-strength nylon make the device very comfortable to hold without hurting your hands.You'll use the equipment to work your upper body muscles, such as your arms, chest, shoulders, and back. Train regularly and your body will get stronger and stronger.Colour: BlackMaterial: carbon steel + rubber + nylonPackage Contents:1 x Arm Strength ExerciserOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.