Fisher CZ-21 Dual-Frequency Underwater Metal Detector with 10.5" Concentric Waterproof Coil advanced Water rating: Coil and lower

Water rating: Coil and lower shaft waterproof

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

Operating principle: VLF single frequency

making it easy to carry during hikes

Fisher CZ-21 Dual-Frequency Underwater Metal Detector with 10.5" Concentric Waterproof Coil advanced Water rating: Coil and lowerThe 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