Durable construction handles rough ground conditions and frequent use

Extra sensitive 45 kHz VLF performance

the adjustable iron audio (Fe-Tone) lets us reduce or mute the low bass tone that signals square nails and horseshoes

The punch plate is anodized steel that simply slides into the unit

Durable High-Quality Material: Crafted from high-quality and robust materials

Fisher CZ-21 Metal Detector with 10.5" Concentric Waterproof Search Coil (Open Box) seahunter-mark-ii Durable construction handles rough groundOpen Box Demo Fisher CZ 21 Metal Detector with 10. 5 Concentric Waterproof Search Coil, Submersible Headphones, Two Year Warranty. This Versatile, Waterproof metal detector is Submersible up to 250 feet and features Dual Frequency Fourier Domain Signal Analysis, Easy Manual Ground Balance, High Performance in Mineralized Soil, All Metal Auto Tune Mode, 3 Tone Audio Target ID, The Fisher CZ 21 is ideal for Beach Hunting, Shallow Water, Lake Surf, and