The Depth Cali is a revolutionary new device that allows users to measure the depth of any object or structure. This device works by transmitting a signal down into the object or structure and receiving an echo back from it. The echo is then analyzed and the depth is calculated. The Depth Cali can be used for a variety of purposes such as checking the depth of a swimming pool, measuring the depth of a well, or determining the depth of a hole in the ground. The device is easy to use and highly accurate, making it a great choice for anyone looking for a reliable way to measure the depth of an object or structure.