We are the proud manufacturer of our portable static water level meters. The Powers Well Sounder comes in 3 sizes with cable ranging from 100-2000FT. We can also mark the cable in meters for our international customers. Our cable is marked with numbers every 2 feet and a dash in between. These sounders run on a 9V battery and can be rebuilt for a fraction of the cost of a new one. We work hard to buy American and keep 99% of our parts sorced within the USA. If you have any questions don’t hesitate to call and talk to Alicia.