Garrett ACE 400i


a simple easy to use metal detector that offer best entry for hobbyists and beginner prospectors into metal detection and gold prospecting world.

2 Years
Sound System, VLF System
Coins, Gold, Metals
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Garrett Ace 400i metal detector

The new Ace 400i metal detector incorporates the latest Garrett technology, which was launched in 2016. This device is ideal for finding coins, relics, treasures and jewelry.

This device has improved iron discrimination, manual ground balance, graphic object analysis, one-touch, iron tones, pinpointing and more precise object identification with numbers.

The Ace 400i is the top model in the Ace series. The value for money of the Garrett Ace is very good. For example, this Garrett Ace 400i digital metal detector has a search frequency of 10 Khz and five search modes for jewelry, coins, relics or all metals. You also have the option of creating your own user modes. The object identification (metal type recognition) can be easily read on the display and also a depth display in cm. Unwanted iron items like nails and bottle caps can easily be excluded from your search process. The Ace 400i has an extra strong camlock rod attachment for very stable and comfortable search movements.

Higher search frequency

The Ace 400i with its 10 KHZ has a higher search frequency than the earlier Ace models (6.5 KHZ-Ace 150, Ace 250, Euro Ace, Ace 200i and 300i) The advantage of this 10 KHZ higher search frequency is the improved sensitivity to low and medium conductive objects (gold, lead etc.)

DD search coil for good depth range
Equipped with the Proformance DD search coil 21.5 x 28 cm (8.5 “x 11”) for additional depth performance and precise point allocation. This search coil reduces the negative effects of mineralized soils. You will be able to get a good range of depth. Up to 35 cm for objects the size of a coin, up to a maximum of 125 cm for large objects.
Numerical object identification (1-99)
The Ace 400i metal detector has both segment identification and numerical object identification (1-99). As soon as the metal detector detects an object, a tone is heard and a number appears in the center of the display. Each number represents a type of metal. (For example, No. 76 euro coin, number 20 iron) For example, you can learn to identify (recognize) objects. To make it even easier, a block appears under the segment bar at the top of the display at the same time. You can read about the type of metal what the object can be. (e.g. iron). In addition, the Ace 400i has 3 different audio tones. A low tone for iron, a medium tone for gold and other objects, and a high tone for silver.
You can adjust the sensitivity (depth) yourself, as well as the discrimination. The Eiser discrimination of the Ace 400i is very accurate and even better.
Iron audio / iron tone
The Iron Audio feature allows the user to adjust the volume for iron, which makes the iron signal easier to hear, or it can be turned off completely so you won’t hear a sound if iron is detected. This function contributes to the better detection of iron objects. The advantage of Iron Audio over the discrimination function is that you keep the low range. If you use the discrimination function, it always has a negative effect on your depth range.
Pinpoint location
The Garrett Ace 400i has a pinpoint function as an extra. This is a tool for the exact location of objects. This allows you to find the position of the object more precisely and so you have less work to dig up the object.
The notch function enables you to discriminate very precisely. You can now even discriminate against certain ID sigments.
Frequency switch
To prevent interference with other metal detectors and electronics, the Ace 400i offers a frequency switch. If your detector is interfered with by other detectors, you can easily change the frequency.
Waterproof search coil
The Ace 400i has a waterproof search coil, only the display is not waterproof. So you can use the detector in shallow water as long as the display doesn’t get wet. Even when it rains, you have to protect your display with electronic protection.
Reaction speed
This metal detector is characterized above all by its depth range and its fast reaction speed. The latter is especially important when several objects are right next to each other. Most metal detectors only give you a signal. You will notice with the Ace 400i that it lets you hear and see that there are multiple objects.
Good depth performance
With the powerful elliptical and waterproof 21.5 x 28 cm DD search coil (8.5 x 11 inches) you can achieve a good depth range. Up to 35 cm for objects the size of a coin, and up to 1.25 m for large objects.
Excellent price-performance ratio
The easy-to-use system and low weight make the Garrett Ace 400i suitable for the whole family. The robust construction, the modern technology and the sporty yellow design make the Garrett Ace 400i the most popular starter metal detector, with which you will experience years of fun. For quality and good performance, choose a Garrett Ace metal detector!


  • Ace 400i metal detector
  • 8.5 “x 11” (21.5 x 28 cm) PROformance waterproof DD search probe
  • Probe rod with coil attachment
  • Clear sound headphones with volume control
  • Spool protection 28 x 22 cm
  • Cover hood for the electronics housing
  • 4x AA batteries
  • Instructions in German, Dutch, English, Spanish and French
  • 2 year warranty
Electronic Pinpointing

5 Search Modes

The prospector can choose one of five search modes available in the device to suit different situations depending on the terrain and the size and type of targets

Electronic Pinpointing

This non-motion All-Metal Mode function is used to precisely locate a detected target’s position.

Iron Audio

The device includes an iron audio feature so that the device makes a special audio tone when there is a metal target made of iron and thus the prospector can avoid this object before digging and wasting time on scrap and metal waste and focus on detecting valuable objects.

Iron Audio allows to hear discriminated iron (normally silenced) to avoid digging undesired flat iron targets such as bottle caps or washers.

Digital Target Id

The device displays on its screen a special identifier number called the digital target identifier (Target ID), which is a number within the range 0 – 99 related to the electric conductivity of the metal and thus gives the prospector an idea of the buried target where the value changes with the change of the type of metal and with experience and expertise user can know the various targets IDs such as gold.

Depth Indicator

The device contains a depth indicator for coins that gives an approximate value of the target depth in relation to a metal object the size of a small coin and this feature is useful when searching for old valuable coins made of gold and copper for example.

Lightweight Ergonomic design

Garrett ACE 400i is designed according to an attractive and comfortable design, consisting of materials that guarantee light weight, which gives ease in carrying and practical use for a long time

Search frequency 10 kHz
technology VLF (Very Low Frequency)
Type metal detector Digital
service Pushbuttons
Number of search modes 5 search modes:
-All Metal
-Jewelry Jewelry
-Relics (relics)
-Coins (coins)
-Custom (self-adjustable mode)
Search coil 8.5 "x 11" (21.5 x 28 cm) PROformance waterproof DD search probe
Weight metal detector 1.3kg
Adjustable rod length Yes, adjustable from 106 - 129 cm
Adjustability and shape of the linkage Simple, with a round rod
Control unit (electronics) watertight No
Headphone jack yes, 6.3mm jack connection
Built-in wireless module No
target group Beginners, adults and children
Type and number of batteries 4 x AA batteries
Battery life 20-25 hours
Readable battery level indicator Yes, in 4 segments
Readable depth range Yes, in 4 segments (2 "/ 5cm, 4" 10cm, 6 "/ 15cm 8" + / 20cm +)
Soil mineralization can be read on the display No
Ground balance Automatically
Sensitivity (sensitivity adjustment) Yes, adjustable in 8 levels
Pinpoint function Yes
Discrimination of unwanted objects Yes
Notch filter Yes
Notch volume No
Object identification through audio tones (metal type recognition) Yes (3 different tones)
Object identification readable on the display (metal type recognition) Yes, 12 LCD segments indicate the different types of metal
Conductance display (metal type detection)  Yes, 1-99
Recovery speed (reaction time) Well
Volume control Only through headphones
Display lighting No
Backlight push button No
Search coil lighting No
Vibration as a metal detector signal No
Online software update No
Frequency changer Yes, F1, F2, F3, and F4
Threshold (background tone) No
Operating software in different languages No, only in English
Depth range of small objects (1 euro) maximum 35 cm
Maximum depth range large objects Maximum 120 cm
Suitable for use on the coast Yes
Suitable for wading (completely underwater) No, only the search coil is waterproof
Suitable for diving No
Suitable for mineralized soils No
Suitable for wet salty soils (by the sea) No
Suitable for finding gold nuggets (Africa, Australia) No
Other additional functions - Immediate search after switching on (without programming)
- Stable Cam-Lock linkage as with Garrett AT Pro for the best stability
-Memory memory for self-selected discrimination
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