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Midland MicroMobile® MXT400

40-watt GMRS base radio for vehicle or home use

Item # 102MXT400

When you have a lot of ground to cover, it takes a powerful radio to keep in touch.

When you have a lot of ground to cover, it takes a powerful radio to keep in touch.

California customers:
Please click here for your Proposition 65 warning.

Item # 102MXT400

In stock

About the Midland MicroMobile® MXT400

Serious range for sprawling properties

When you have a lot of ground to cover, it takes a powerful radio to keep in touch. Midland's MXT400 MicroMobile radio gives you incredible range, plus a host of high-tech features. It works great in your car, truck, or ATV, or you can set it up at your home, office, or lodge. For ranchers, farmers, and anyone else with a lot of land to traverse and manage, this 40-watt radio is the best way to keep in touch.

Serious range for sprawling properties

When you have a lot of ground to cover, it takes a powerful radio to keep in touch. Midland's MXT400 MicroMobile radio gives you incredible range, plus a host of high-tech features. It works great in your car, truck, or ATV, or you can set it up at your home, office, or lodge. For ranchers, farmers, and anyone else with a lot of land to traverse and manage, this 40-watt radio is the best way to keep in touch.

Cover the wide-open spaces

With a whopping 40 watts of power and an external magnetic-mount antenna (sold separately), you'll enjoy remarkable range and reliability over open terrain. You'll be able to access 8 repeater channels and 15 high/low power channels with the easy-to-reach buttons, while 142 privacy codes make it highly unlikely that you'll trip over anyone else's transmissions. You can scan channels, too, so you won't miss anything important. You can use it to communicate with any other Midland GMRS radio, as well as most walkie-talkies.

Keep up with the weather

It's essential to keep up with changing conditions in the field, so the MXT400 gives you 10 NOAA weather channels. If a front's rolling in, you'll be able to plan accordingly and get to a safe place.

Clarity and control

This radio boats plenty of power, but it also offers some smart features. "Silent mode" operation ensures keeps distracting beeps and tones out of the mix entirely. You'll also appreciate features like auto-squelch, monitor mode, keypad lock, an external speaker jack, digital volume controls, and a backlit high-contrast LCD that's easy to see, day or night.

Installs wherever you need it

The MXT400 is easy to install in your home or vehicle. The detachable flip-frame mount secures on or under the dash, and you can slide the radio out when you need to. Midland includes a 12-volt adapter for mobile use. An antenna and mount (sold separately) are also recommended for this radio.


Product highlights:

  • 40-watt GMRS base radio
  • 8 repeater channels for increased range
  • 15 high and low power channels
  • 142 privacy codes
  • channel scan to monitor radio activity
  • controlled frequency synthesizer
  • high-grade microphone
  • silent operation quiets beeps and tones
  • digital volume controls
  • external speaker jack
  • backlit LCD display
  • compatible with Midland (and most other) GMRS two-way radios
  • 12-volt power adapter included
  • mount and mounting hardware included
  • for max range, use an external antenna and mount (sold separately)
  • 12-volt-to-AC converter sold separately (see Accessories)
  • FCC license required
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # MXT400

What's in the box:

  • 2-Way radio
  • Microphone w/ 3' cord
  • Mounting bracket
  • 79" Power/ground harness w/ in-line fuse holders on both wires (15 A fuses installed)
  • Four 3/4" screws
  • Four 5/16" machine screws
  • Four flat-washers
  • Four lock-washers
  • Two spare fuses
  • Owner's manual
  • Quick-start guide

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More details on the Midland MicroMobile® MXT400

Stacey B.

Product Research


Overview: The Midland MXT400 is a GMRS (General Mobile Radio Service) two-way radio with a broadcast range of up to three times that of standard, hand-held, two-way radios (walkie talkies) providing a full 40 watts of power for a maximum operational range of up to 65 miles. Key features include: 15 high power GMRS channels, 8 repeater channels for increased range, 142 privacy codes, Auto channel-scan, and Silent Operation. The MXT400 is compatible with all Midland and most other brands of GMRS radios. Its compact and durable housing can be mounted under a dashboard or glove box with the included mounting hardware, and it also includes a hand-held PTT (push to talk) microphone. MXTA11 GMRS antenna and MXTA12 antenna mount sold separately.

Note: Operation of a GMRS radio requires an FCC license.

Range: With 40 watts of power, the MXT400 can provide exceptional communication range. The following is an estimated range guide:

  • Maximum distance is up to 65  miles line of sight with no obstructions.
  • 15 - 20 miles with partially obstructed line of sight (trees, small hills, etc).
  • 5 - 10 miles with major obstructions to line of sight (buildings, larger hills, mountains, etc).

Channels: The MXT400 provides 15 GMRS channels that can be selected manually or with the Auto-scan mode that continuously scans all 15 available channels for activity. It also includes a Monitor Mode that lets you check for activity on the currently selected channel. This mode also lets you adjust the volume of the radio if you're not receiving a signal from an assigned transmitter. The MXT400 has the ability to access up to 8 repeater channels which can significantly increase the radio's range and coverage area.

  • FRS Compatibility: FRS (Family Radio Service) radios share the some of the same channels as GMRS radios (1-7 & 15-22), however at a lower transmitting power level (2W or less). This allows the MXT400 to be used with FRS radios, but with a shorter communication range. Channels 8-14 are strictly for FRS radio use and cannot be used by the MXT400.
    • Note: If using a GMRS radio to communicate with an FRS radio, communication range will be limited to the FRS radio's ability.

Squelch and Privacy: Squelch is the ability of a transmitter/receiver to suppress or mute the channel if the signal level weakens enough. This helps keep out unwanted channel noise and stray signals from other devices, especially when there's no signal being sent from a transmitting device. The MXT400 has adjustable Squelch sensitivity, with a level of 00 being the most sensitive allowing the squelch to open on very weak signals and a maximum setting of 09 which requires a very strong signal to open the squelch. The radio also features Privacy Codes via CTCSS (Continuous Tone Coded Squelch System) and DCS (Digitally Coded Squelch). These systems allow several users to share the same channel without disturbing each other. When CTCSS or DCS is enabled for a selected channel, the channel is muted to all incoming signals unless they carry the correct CTCSS or DCS tone. When a transmission with the correct tone is received, the mute is lifted and the voice audio can be heard. The MXT400 has 142 total Privacy Codes, 38 CTCSS and 104 DCS.

Menus: The following are the 11 menu options available on the MXT400:

  • TX: Transmit. This selection allows the transmitter to be disabled if using the radio as a receiver only.
  • Talk: Talk Around Function. This allows you to directly communicate with other radios in your group when the repeater is not active or out of range.
  • Comp: Voice Compander. This function is used to reduce background noise and enhance audio clarity, especially in long range communication.
  • Mute: Silent Operation. When this function is On, all operational "beeps" and "tones" are disabled.
  • Call: Call Alert. Used to select one of 5 available tones to alert of an incoming message.
  • TOT: Time Out Timer. This limits the amount of transmitting time the radio has per PTT activation.
  • APO: Auto Power-Off. Allows you to set a time interval to automatically power the radio off after no use.
  • SQL: Adjusts the Squelch Sensitivity.
  • Lamp: Allows the LCD display brightness to be adjusted with 6 levels available.
  • RP: Repeater. Allows you to access any of the 8 repeater channels.
  • Restore: Restores unit back to factory default.


  • PTT: Push-to-talk. This activates a transmission when pressed.
  • Channel Up/Down: These two buttons cycle through different channels.
  • Lock Switch: This slide switch will lock the Channel buttons on the mic, but not the PTT button.

Front Panel:

  • Channel: This dial cycles through all of the available channels.
  • TX: This LED will light when transmitting a signal.
  • Menu: Opens up the Menu options.
  • Call/Lock: A quick press of this will send a call signal and a long press will lock the keypad.
  • Power Level: This button cycles through the 3 transmit power levels; Hi, Mi, and Lo. Only Mi and Lo will be displayed with icons on the LCD screen.
  • Power: Turns unit on/off.
  • Volume
  • Mic Jack: This is an RJ45 socket to plug the hand-held mic into.
  • TS/DCS: This button cycles through the Privacy Tone options.
  • Select: Allows any currently highlighted menu item to be selected.
  • Scan/Mon: Pressing will enter scan mode, a long press enters monitor mode.
  • Data Terminal: Not used.

LCD Display: The MXT400's display will show the following information:

  • Transmitting Strength: Will display Mi or Lo unless Hi is selected (no icon will be displayed).
  • A Icon: Shows if the Auto-Power Off option is on.
  • + / - Icons: Indicate repeater offset.
  • T SQ Icons: Display CTCSS Privacy Tone.
  • DCS: Displays DCS Privacy Tone.
  • Key Icon: Shows if the Keypad Lock is on/off.
  • Compander Icon: Shows Compander selection.
  • Signal Strength: A 5-segment meter shows signal strength.
  • Busy Icon: Shows if the Receiver is active.
  • Channel Name: Will be displayed in the center of the LCD.
  • rP Icon: Displays the Repeater Channel if being used.

Rear Panel:

  • ANT Jack: An SO-239 UHF socket for external antenna (sold separately).
  • EXT SPKR: A 3.5 mm audio jack to connect an optional external speaker.
  • External Power Jack: Power socket for an optional DC power supply .
  • Power/Ground Pigtail: This is a non-removable 12" pigtail for the power and ground wires. The power wire includes an in-line fuse holder with a 15A fuse installed. A Molex plug on end of wires attaches to a Molex plug on the 79" power/ground extension harness. Additional fuse holders with 15A fuses are included on both the power and ground wires of the 79" extension harness. Wires terminate in bare-ends.


  • Transmitting Power: 40 W
  • GMRS Channels: 15
  • Privacy Codes: 142
  • Repeater Channels: 8
  • Antenna: MXTA11 sold separately
  • Accessories: Mounting bracket
  • Dimensions: Width - 5.50", Height - 1.66", Depth - 7.44"

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Customer Q&A

2 questions already asked

What is involved in getting licensed for these units?
[ Mike  Jan 09, 2021 ]
1 answer
Check out the MidlandUSA site. Read their article on "WHY DO I NEED A GMRS LICENSE & HOW DO I GET IT?". It is really comprehensive on how to obtain a GMRS License.
[ Jason  Jan 11, 2021 ]
how many channels does it have?
[ stanley  Jan 25, 2019 ]
1 answer
Hi, 15 normal FRS/GMRS plus 8 repeater access channnels.
[ Athanasius  Jan 25, 2019 ]

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