Merrytek MSA021D RC User Manual page 9

4. DIP Switch Setting Indication: (The following figure)
Toggle up the DIP Switch to "ON", downwards to "-"
Take the sensor settings "Detection area: 100%, Hold time: 1min,
Daylight sensor: Disable, indicator light: on" as an example, toggle the
settings according to the below picture:
DIP Switch numbers 1-4 are toggled up, DIP Switch numbers 5-7 are
toggled down, and DIP Switch number 8 is toggled up. Other settings
can be deduced by analogy.
Toggle up the DIP Switch to "ON"
Downwards to "-"