Fisher CZ-21 Dual-Frequency Underwater Metal Detector with 10.5" Concentric Waterproof Coil advanced If you are hunting silver

If you are hunting silver

Operating principle: VLF single frequency

nickels and pull-tabs hold the medium tones

Operating Temp Range: 4 to 122 degrees F (-20 to 50 degrees C)

Fisher CZ-21 Dual-Frequency Underwater Metal Detector with 10.5" Concentric Waterproof Coil advanced If you are hunting silverThe Fisher CZ 21, known to divers as the CZ21 QuickSilver, is a dual frequency underwater metal detector submersible to 250 feet, built for scuba divers and surf hunters who work saltwater beaches, freshwater lakes, and deep dive sites. This version ships with the larger 10. 5 inch concentric waterproof coil, which covers more ground per sweep and reaches a little deeper on open sand than the 8 inch, making it the choice for wide beach and open bottom