Sangean MMR-77 (V1) - Manual (Page 5)

Note:
The built-in rechargeable battery for Dynamo power will last
for 300-500 times of charging, therefore it’s suggested to
power the radio by standard battery or AC power adaptor
(not supplied).
Radio operation
1. Select the power to be Battery (make sure the batteries
are in and powerful) or Dynamo position by switching
battery/dynamo switch.
2. Switch on the radio by turning the power/volume control.
3. Select required radio band (AM or FM).
4. For FM reception , pull out the telescopic antenna and
rotary it until you receive the best signal. For AM, align the
antenna by turning the radio for best reception and avoid
interference from computer , electronics devices etc.
5. Adjust the volume by rotary volume control.
Listening with earphones
Insert the earphones plug (3.5 mm, stereo) into the
earphones socket on the left side of the device.
This will automatically switches off the loudspeakers.
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