High Accuracy | LCD Display | Discrimination & Pinpoint | Waterproof Coil
The TIANXUN MD-4090 Metal Detector is a perfect entry-level detector packed with premium features to help you get started on your treasure hunting adventures. With one-touch operation, clear LCD display, and multi-tone audio alerts, the MD-4090 is ideal for finding coins, jewelry, relics, and other hidden metals with ease and precision.
Whether you’re exploring the local park, sweeping the beach, or trying your luck in your own backyard, this lightweight and ergonomic detector gives you all the essential tools for success—without breaking the bank.
⚙️ Key Features
✅ Easy-to-Use LCD Display
Visual display shows target type, depth, DISC/NOTCH range, sensitivity, and battery level, with numeric values for DISC and target ID.
✅ Three-Tone Audio Discrimination
Differentiate between metals using high, medium, and low tones to identify coins, iron, and precious metals.
✅ Notch & DISC Modes
Filter out junk like nails and foil with advanced Notch and DISC settings—only focus on valuable targets.
✅ Pinpoint Function
Quickly zero in on the exact location of your target to reduce digging time.
✅ Backlight Display (0–9 Levels)
Hunt in low-light conditions with an adjustable backlight display.
✅ Memory Function
Built-in memory system remembers your last settings—even after powering off.
✅ Waterproof 8.5″ Search Coil
Perfect for wet ground and shallow water detecting—robust and interchangeable.
✅ Adjustable Shaft & Armrest
Customisable 32–42 inches shaft for all ages and sizes. Lightweight at only 1.37–1.4kg.
✅ Headphone Jack
Connect any 1/8″ headphone for quieter operation in noisy environments.
? Specifications
| Feature | Details |
|---|---|
| Model | MD-4090 |
| Brand | TIANXUN |
| Display | LCD + Sound Indicator |
| Detection Modes | All Metal / DISC / Notch / Pinpoint |
| Audio Tones | 3 tones (high, mid, low) |
| Backlight | Adjustable (Levels 0–9) |
| Search Coil | 8.5″, Waterproof, Interchangeable |
| Battery | 1 x 9V (6F22) – not included |
| Length (adjustable) | 32 – 42 inches |
| Weight | 1.37 – 1.4kg |
| Power Type | Battery Powered (9V) |
| Certifications | CE Certified |
? What’s Included
1 x MD-4090 Control Housing
1 x Upper Stem
1 x Waterproof 8.5″ Search Coil + Stem
1 x Wing Nut & Threaded Bolt
1 x English User Manual
Note: Headphones and carrying bag are not included. Battery not included due to shipping restrictions. We recommend a rechargeable 6F22 9V battery, easily available locally or online.
? Perfect For
Beginner metal detecting
Coin and jewelry hunting
Park and beach detecting
Backyard treasure hunts
Educational use for kids & families
✅ Why Choose the MD-4090?
The TIANXUN MD-4090 blends affordability with functionality. It’s the perfect choice for beginners and casual users who want a reliable, full-featured metal detector without the complexity. Lightweight, customizable, and ready to go with just one touch—it’s your passport to the world of metal detecting.
Emily Patel –
As a newbie to metal detecting, the MD 4090 Metal Detector has been a game changer for me. The sleek design, simple controls, and accurate depth readings have made my treasure hunting expeditions a joy. The LCD display is clear, making it easy to identify targets. I’d give this detector 4 stars for its affordability and performance.
Sophie Thompson –
This metal detector is a real gem. The LCD display makes it easy to see what you’ve found. The waterproof coil is a game changer, letting you search even in the rain. The one touch operation is so simple, even my grandma could use it. Plus, the discrimination feature helps you filter out junk. The customer service was top notch, and the packaging was secure. I deducted one star because the audio alerts can be a bit loud. Overall, a solid choice for beginners looking to start their treasure hunting adventure.
Emily Jones –
The MD 4090 Metal Detector is a game changer for my hobby. The LCD display is super clear and easy to read. I love how lightweight and comfortable it is to use. Great buy.
Robyn K. –
The TIANXUN MD 4090 Metal Detector exceeded my expectations with its accurate detection and user friendly LCD display features. It’s perfect for beginners and hobbyists alike, providing hours of fun treasure hunting adventures.
Sophie Black –
great detector. its lcd display makes it easy to see our targets, depth, and disc/notch settings. i love how lightweight it is, perfect for my outdoor adventures. a definite 5 stars for this one.
Rebecca James –
From beaches to parks, the MD 4090 Metal Detector is my trusty sidekick. With its easy operation and accurate pinpointing, finding hidden treasures has never been more exciting. No more aimless searches – thanks to this detector, my hobby is now a breeze.
Emily Howard –
This MD 4090 Metal Detector gets a solid 4 out of 5 stars from me. Been using it for a few weeks now, and it’s pretty good at finding coins and bits of jewelry in the backyard. The delivery speed was alright, and the packaging was nothing special, but hey, it’s the performance that counts, right? It’s light and easy to use, which is a big plus for me. Happy I bought it definitely helps with my mini treasure hunts.
Emily Patel –
As a newbie to metal detecting, the MD 4090 Metal Detector has been a game changer for me. The sleek design, simple controls, and accurate depth readings have made my treasure hunting expeditions a joy. The LCD display is clear, making it easy to identify targets. I’d give this detector 4 stars for its affordability and performance.
Ellie T. –
I recently got the MD 4090 Metal Detector and let me tell you, it’s been a fun experience so far. The LCD display makes it super easy to see what’s going on, plus it’s waterproof, which is a real game changer. Aside from finding cool stuff, the packaging was neat, and the customer service was friendly. Overall, it’s been great for this beginner treasure hunter—you’d enjoy it too. 4 stars from me.
Melissa Thompson (verified owner) –
this metal detector blew my mind. taking it to the beach, i found so many coins and bits of treasure. it’s so much fun i can’t wait to detect more goodies. five stars for sure.
Daisy Thompson (verified owner) –
I recently got the MD 4090 Metal Detector, and oh boy, it’s been a fun adventure finding hidden treasures in the backyard. It’s easy to use and lightweight, making it perfect for a beginner like me. My friends were impressed with the cool finds we dug up. Definitely recommend for some outdoor excitement.