Amazfit Cor is a fitness, sleep and heart rate tracker. The 50-meter waterproof rating allows the user to wear it during a shower or even while swimming. The curved shape of the product follows the shape of the wrist, making it very comfortable to wear. The 1.23-inch color touchscreen offers a rich information and interactive experience. Premium materials such as stainless steel and curved glass make the product more visually appealing. The bands can be easily removed at the touch of a button. The bands come in six different colors. The battery lasts 12 days on a single charge.