The LPS-1 is simple to use. Just put it in the water, point and push the “ON” button. The depth or distance is digitally displayed for 10 seconds before automatically shutting off, with no risk of battery drain. A must for the outdoor enthusiast! Take the compact, lightweight LPS-1 wherever you go: fly-in trips, ice fishing, canoe trips, remote mountain lakes, float tubing, scuba diving and more. For fishing, simply touch it to the surface of the water. For ice fishing, the signal will shoot through clear ice! When diving, use it to check depths or distances to any object under water: reefs, sunken wrecks — even the distance to the surface. Waterproof down to 150´.