
Professional Metal Detector for Adults.
- 12 inch search coil, IP68 waterproof
- 5 modes, DSP chip
- Backlit LCD display
- 53 inches extended length
- 5.8 pounds, battery powered
Last refreshed Sep 11, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A large-coil metal detector for shoreline and prospecting use with a waterproof coil, five modes and a backlit screen. The package quantity entry looks wrong and no battery details are given.
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ASIN: B0D3C25SX8Model: M55Z-SX8Category: Metal Detectors
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Overview
Gbnryg builds this detector around a large waterproof search coil, a backlit LCD and a DSP chip for processing signals. A shaft extends to a stated full length, and the listing positions it for beach and gold hunting.
Reason to buy: the big coil covers ground quickly and the waterproof rating applies to the coil in the title. Limitation: the listing never says what powers it beyond battery, how deep it detects or whether the electronics housing is watertight.
Who it's for
Beach and field hunters who want wide ground coverage and a selection of modes will like the large coil and the screen. Newcomers needing a simple, light unit or detailed specifications should look at better-documented options.
Pros and cons
- Large waterproof search coil
- Five search modes
- Backlit LCD display
- DSP chip for processing
- Control box waterproofing not stated
- Battery type and life unlisted
- Package quantity entry looks wrong
- Heavier than compact models
Performance notes
A larger coil covers more ground per sweep and reaches deeper on large targets, but it is less sharp on small ones. The modes change how the detector treats different metals, and the DSP chip handles signal processing. An IP68 coil can go into water, though the control box is a separate question.
Specifications
| Brand | Gbnryg |
|---|---|
| Model | M55Z-SX8 |
| Dimensions & fit | |
| Search coil size | 12 inches, IP68 waterproof |
| Length | 53 inches |
| Weight | 5.8 pounds |
| Dimensions (L x W x H) | 17 x 11 x 5.9 inches |
| Power & efficiency | |
| Power source | Battery powered |
| Construction & materials | |
| Case material | Metal, plastic |
| Color | M55Z and green |
| Other details | |
| Modes | 5 |
| Display type | LCD with backlight |
Frequently asked questions
How do I care for the Gbnryg detector after beach use?
The listing gives no care instructions. Only the search coil is called IP68 waterproof, so rinse the coil and keep the control box dry, and wipe it down before storing.
Does the Gbnryg detector come as a 24 count pack?
The unit count entry says 24 Count, which looks like a listing error for a single detector. Confirm the quantity with the seller.