Manufacturer Fisher Quick Look The CZ-21 QuickSilver by Fisher® Research Labs is a trusted and reliable metal detector, known for its robust design and exceptional performance Land and Sea! SKU 12-CZ21-10 Manufacturer SKU CZ21-10 Product Type Metal Detector Best for Beach, Relic, Coin, Gold, Advanced Warranty 2 Years Technology VLF (Very Low Frequency) Simultaneous Multi-frequency Yes Selectable Single-frequency No Backlit Display No Flashlight No Vibration No Selectable Modes Yes Target ID Numbers No Iron Bias Yes Display Type None Depth Indication No Rechargable Battery No Swappable Battery Yes Battery Type 9V Alkaline Number of Batteries 4 Additonal Search Coils Available No Headphones Included Yes Headphone Jack Hardwired Wireless No Wireless Type N/A Can Pinpoint No Auto Ground Balance/Noise Cancel Yes Manual Ground Balance/Noise Cancel Yes Adjustable Sensitivity Yes Adjustable Threshold No Adjustable Volume Yes Waterproof Control Box Yes Weatherproof Control Box Yes Waterproof Coil Yes Submersible Yes