Designed for convenience, portability and versatility, the Stamina Wonder Exercise Bike packs a workout that's good for the whole body. Engage your core and legs with the bike. When you're ready, take it to the next level with the included Wonder Arms. The Wonder Arms help you strengthen and tone your arms, shoulders, chest and back. Exercises like chest press, curls, flies and many more are possible with the smooth bungee cord and pulley system. Easily adjust between exercises by pulling the adjustment knob. The arms will automatically adjust to the same position on each side. The soft, padded grips are comfortable on your hands. Wonder Arms make for a convenient and comfortable upper body workout you can do on your exercise bike. Also included with this product is free online access to 2 on-demand workout videos.