Model MB400
midlandusa.com
Page 9
ABOUT RANGE
Your MB400 radio is designed to give you maximum range under optimum
conditions
.
• Make sure you are using the same channel/frequencies as
others in your communications group or you will not be able to
hear or talk to them.
Industrial
Multi-Level
Inside Steel-Concrete Building
Up to 350,000 sq. ft. Up to 30 floors
Inside a Multi-level Building
Optimum Conditions are:
• Open warehouse floor plan or area.
• Open rural areas without obstructions.
• Flat areas where you can see the other person to ensure you get
maximum range.
• You are using fully charged batteries - a low battery will cause low power
conditions.
• Your radio is set to use its highest transmit power level.
OPERATING YOUR RADIO
POWER ON/OFF AND VOLUME
1. Rotate the POWER/VOLUME knob clockwise to turn the radio on and
increase the volume level.
2. Rotate the control counter-clockwise to reduce the volume level
and to turn the radio off.
3. During Power On, the radio will announce the channel it is set to.
TRANSMITTING AND RECEIVING A CALL
For maximum clarity, hold the radio at least 1 inch (2.5 cm) from your mouth.
1. Press and hold the PTT button and speak in a normal voice into the
Microphone. The RX/TX LED will glow RED while transmitting.
2. To receive a call, release the PTT button. The RX/TX LED will glow
GREEN when your radio is receiving a transmission.
CHANNEL SELECTION
1. Rotate the channel section knob to the desired setting.
2. The radio will announce the channel numbers as you rotate the knob.
MB400 Owner's manual_3-4-2019.indd 9 3/5/19 1:57 PM
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