Motorola RMU2080d User Manual page 61

Symptom
Heavy static or interference
Low batteries
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Radios are too close; they must be at least five feet apart.
Radios are too far apart or obstacles are interfering with transmission.
Refer to "Talking and Monitoring" on page 29.
Recharge or replace Li-Ion battery.
Extreme operating temperatures affect battery life.
Refer to "About the Li-Ion Battery" on page 15.
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