The iKALL W4 keeps health, fitness, and comfort in one device. It checks your heart rate, oxygen level, blood pressure, and sleep. The three-ring health system helps you understand your daily progress in a simple and clear way. With wireless charging and a water-resistant body, you can use the watch without stress. It is made for people who want smart features with an easy design. https://www.ikall.in/product-page/i-kall-w4