Model MB400
midlandusa.com
Page 7
INSTALLING EXTERNAL ACCESSORIES
Remove the accessory jack cover using a flat blade screwdriver or a coin. Save
the cover and screw for re-assembly.
•The MB400 will no longer be IP67 waterproof
when the accessory jack cover is removed.
• Insert the accessory plug into the speaker/
mic jack, making sure it is securely in place.
CHARGING THE BATTERY PACK
Your radio is equipped with a Lithium-Ion battery pack which can be recharged
by inserting the radio or battery into the desktop charger (as described below).
You should charge the battery pack when the Charge Battery Alert comes on,
and remove the radio from the charger when the charging is finished.
To charge using the Desktop Charger:
1. Plug the DC barrel plug on the adaptor cord into the connector on the back of
the charging base.
2. Plug the AC adaptor into a 120V AC wall outlet, making sure the AC outlet has
power.
•The charger’s LED’s turns green when power is present.
3. Make sure the battery contacts and charge terminals are clean and in good
condition.
4. Slide the radio with installed battery, or a spare battery without radio, into the
charger being careful to align the slots on the battery with the tabs inside the
charger base.
5. The charger LED’s will turn red and begin charging the battery.
6. Charging time depends on the charge level of the battery.
7. After charging is complete the LED will turn Green.
8. Remove the radio from the charger.
Speaker/Microphone
Jack Cover
Speaker/Microphone
Jack
MB400 Owner's manual_3-4-2019.indd 7 3/5/19 1:57 PM
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