Discover lost jewelry and coins from the sand and water with the Tesoro Sand Shark Metal Detector! This Pulse Induction detector expertly handles the mineralization of salt water and is submersible to 200 feet. Tesoro’s Sand Shark is among the most affordable underwater detectors for hunting the beach, shallow surf, wading, scuba diving and shipwreck hunting. PI detectors are the deepest-seeking underwater units on the market, and the Tesoro Sand Shark is feature packed! It includes a Pulse Width control for depth and sensitivity and two operating modes: VCO and Normal. Voltage Controlled Oscillator mode gives off a louder, higher-pitched tone as the target gets close to your coil. The strongest signal will be closest to the center of the search coil. Normal mode is designed for extended beachcombing. Owners of the Tesoro Sand Shark are passionate that it is the best “bang for your buck” underwater detector!