MB400 Business Radio — Owner’s Guide

Introduction

The Midland MB400 is a professional-grade UHF business two-way radio designed for reliable communication in demanding environments.
For support, contact Midland at (816) 241-8500 (9 AM–4 PM CT, Mon–Fri).

Features

• 4 or 16 channel operation (programmable)

• 450–470 MHz UHF frequencies (FCC license required)

• 5 Watts transmit power

• High/Low power setting

• 260 privacy codes (CTCSS/DCS)

• Channel scan and monitor functions

• VOX (voice-activated transmit)

• Battery save mode

• Busy channel lockout

• Time-out timer

• Keypad lock

• Compatible with cloning cable for quick programming

• Programmable via PC software

• NOAA Weather Alert (optional programming)

FCC Licensing

The MB400 operates on UHF business frequencies requiring an FCC license for legal use in the United States.
For more details, visit fcc.gov or call 1-888-CALL-FCC.

Getting to Know Your Radio

Controls and Indicators

A. Antenna – Fixed, non-removable.

B. LED Indicator

• Green – Receiving signal

• Red – Transmitting

• Blinking Orange – Scanning

C. Speaker

D. Channel Selector Knob – Selects channels 1–16.

E. Emergency Call - Send emergency alert to other MB400s on the same frequency

F. Power/Volume Knob – Rotate clockwise to power ON and increase volume; counterclockwise to decrease/turn OFF.

G. Microphone

H. PTT (Push-to-Talk) Button – Hold to transmit.

I. Programmable Side Keys

J, Accessory Port – For headsets, speaker mics, or programming cable.

K. Rechargeable Battery Pack

Battery Installation & Charging

1. Align battery contacts with the radio contacts.

2. Press battery into place until it clicks.

3. To remove: Slide battery latch downward and lift battery away.

4. To charge:

   • Place radio in supplied desktop charger.

   • LED on charger: Red = charging, Green = fully charged.

5. Initial charge: 4–6 hours before first use.

Basic Operation

Turning the Radio On/Off

• Turn the Power/Volume knob clockwise until click to power ON.

• Turn counterclockwise until click to power OFF.

Adjusting Volume

• Rotate Power/Volume knob after turning radio ON.

Selecting a Channel

• Rotate Channel Selector knob to desired channel (1–16).

Transmitting

• Hold PTT, speak clearly into microphone (2–3 inches away).

• Release PTT to listen.

Programmable Features (via PC or Dealer)

• Channel Frequency

• High/Low Power Setting

• CTCSS/DCS Privacy Codes

• VOX Sensitivity

• Scan List Programming

• Side Key Functions

• Time-Out Timer

• Busy Channel Lockout

Cloning

• Use Midland cloning cable to duplicate settings between radios.

• Connect both radios, set to clone mode, initiate from master radio.

Care and Maintenance

• Clean with a soft, damp cloth.

• Do not submerge or expose to solvents.

• Use only Midland-approved accessories.

Technical Specifications

Factory Default Programming

The MB400 ships from the factory with the following default frequencies and settings. Each channel can be reprogrammed as needed (FCC license required).

Note: Channels 1–8 are pre-loaded business frequencies. Channels 9–16 can be programmed with additional business, weather, or custom frequencies using Midland’s programming software.

Limited Warranty (U.S. Only)

• Two-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