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ACR ELECTRONICS, INC.
Product Support Manual
Portable Safety Megaphone
Adjust the volume control knob to a suitable sound level. The volume control may be adjusted with the
thumb of the same hand holding the megaphone.
When not in use, carry the megaphone by the neck strap, attached to the top of the unit.
2.1 Battery Monitor
Two types of battery monitors are available on the ACR/EM series megaphones.
Visual – when the megaphone is activated by squeezing the handle, note if the green LED (located near
the volume cap) is flashing. If the green LED is out, replace batteries.
Audible – when the megaphone is activated by squeezing the handle, a chirp heard in the speaker
means the remaining battery capacity is greater than 50% of initial capacity. If the beep is not present,
replace the battery. (ACR/EM-1D only)
Figure 1
Block diagram
ACR/EM-1A, ACR/EM-2BA and ACR/EM-1D Portable Safety Megaphone
Y1-03-0340 Rev. C
Company Confidential
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