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Midland MXT105B MicroMobile™ GMRS Radio - Full User Guide

Customer Experience
Updated

Welcome to the World of Midland Radio

Thank you for choosing the MXT105B MicroMobile™ GMRS Radio from Midland Radio Corporation. Please read this manual thoroughly to ensure you get peak performance from your radio.

For more information, visit midlandusa.com or contact our Customer Service at support@midlandusa.com, or (816) 241-8500, Monday–Friday, 9:00 AM to 4:00 PM CT.

Features

  • 15 GMRS Channels

  • 142 Privacy Codes

  • Weather Alert and Listen to Weather

  • High / Low Power Settings

  • Keypad Lock

  • External Speaker Jack

  • Backlit Display and Keypad

  • Monitor Function

FCC Notice & RF Exposure

The MXT105B operates on GMRS frequencies requiring an FCC license. You must be licensed to use channels 1-7 or 15-22. Visit fcc.gov to apply.

To limit RF exposure:

  • Maintain at least 15.5 inches (40 cm) between you and the antenna.

  • Transmit no more than 50% of the time.

Installing Your Radio

Preparation

  1. Ensure your vehicle is a 12-volt negative ground system.

  2. Disconnect the vehicle’s negative battery cable.

  3. Choose a mounting location that does not impair visibility or driving.

  4. Avoid drilling into areas with hidden wiring.

Mounting Bracket Installation

  1. Use the bracket as a template and mark holes.

  2. Attach bracket with included screws (do not over-tighten).

  3. Slide radio into bracket until retainers engage.

About Range

Your MXT105 is designed to give you maximum operating range under optimum conditions:

"Optimum condition" examples for maximum operating range are:

  • Over water
  • In open rural areas without obstructions
  • On flat areas where you can see the other radio user

Antenna Installation

  • Place antenna as high as possible on a flat metal surface.

  • Avoid surfaces with vinyl or fiberglass.

  • Keep cable away from vehicle electronics and do not crimp it.

Rear Panel Connections

  • ANT Jack – Connect included antenna

  • EXT SPKR Jack – Optional external speaker

  • DC Power Jack – 12V DC input

Power Connection

Plug into your vehicle's DC port, or hardwire as follows:

  • Red wire: +12V accessory fuse or battery

  • Black wire: Ground or - battery terminal

Controls and Indicators

Front Panel Controls

Screenshot 2025-05-29 at 10.44.34 AM.png

  1. Volume Up

  2. Channel Up

  3. Menu / Lock

  4. Power / Brightness

  5. Monitor / Weather

  6. Scan

  7. Channel Down

  8. LCD Display

  9. Volume Down

  10. Microphone Jack

LCD Icons

  • Receive/Monitor – Incoming signal or monitoring

  • Squelch – Privacy code active

  • Scan – Scan mode active

  • Lock – Keypad locked

  • Channel Number – Current channel

  • Signal Strength – Transmission strength

  • TX – Transmitting

  • Weather Icon – Weather mode or alert active

Operating Your Radio

Power On/Off

  • Press and hold the Power button (2 sec) to turn on/off.

Channel Selection

  • Use Channel Up/Down to scroll through 15 GMRS channels.

  • To communicate, radios must be on the same channel and privacy code.

Transmitting and Receiving

  • Press PTT (Push-To-Talk) on the mic to transmit.

  • Release PTT to listen. Adjust volume as needed.

Locking the Keypad

  • Hold Menu for 2 seconds to lock/unlock the keypad.

Adjusting Display Brightness

  • Press Power to cycle through 5 brightness levels, including off.

Monitor Mode

  • Tap Monitor/Weather to listen for weak signals or check channel activity.

Weather Alerts and Channels

Setting the Weather Channel

Auto Scan:

  1. Hold Monitor/Weather (3 sec) to enter Weather Mode.

  2. Radio auto-scans for NOAA station.

  3. Press Menu to save when you hear broadcast.

Manual Entry:

  1. Enter Weather Mode.

  2. Press Menu, then use Channel Up/Down to select correct weather channel.

  3. Press Menu again to save.

Listen to Weather

  • Enter Weather Mode to hear local forecast.

  • Press PTT to exit.

Weather Alert Mode

  1. Enter Weather Mode.

  2. Press Menu twice to reach Alert ON/OFF.

  3. Set to ON to enable Weather Alerts (icon flashes).

  4. Press Menu to save and PTT to exit.

Scanning for Active Channels

Channel Scan

  1. Tap Scan button to start.

  2. Radio will pause on active channels.

  3. Press PTT to talk or wait 5 seconds for scan to resume.

  4. Tap Scan again to stop scanning.

Edit Scan List

  1. Go to channel you want to remove.

  2. Hold Scan (3 sec) to remove it from scan list.

  3. Repeat to re-add the channel.

Menu Settings

Options Available

  • Privacy Codes: CTCSS (1–38) or DCS (1–104)

  • Squelch Sensitivity: 0–9

  • Keypad Beep: On/Off

  • Roger Beep: On/Off

  • Power Level: High/Low

How to Adjust

  1. Press Menu.

  2. Use Channel Up/Down to find setting.

  3. Press Menu to enter.

  4. Use Up/Down to adjust.

  5. Press Menu again to save.

Care and Maintenance

  • Clean with water-moistened cloth only.

  • Avoid alcohol, harsh cleaners, and full submersion.

  • Dry with lint-free cloth if wet.

Troubleshooting

If problems persist:

  • Refer to the manual’s troubleshooting guide.

  • Call (816) 241-8500 for support before returning the unit.

Specifications

  • Channels: 15 GMRS + 10 NOAA Weather

  • Privacy Codes: 38 CTCSS + 104 DCS

  • Frequencies: 462.5500 ~ 462.725 MHz

  • Power Source: 13.8 VDC Nominal

Limited Warranty (U.S. Only)

  • Three-year warranty from date of purchase on radios.

  • 90-day warranty on accessories.

  • Does not cover misuse, water damage, or unauthorized repair.

  • Submit warranty claims in the Midland Returns and Claims Portal

Download the full owner's manual here.

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