Eclipse CD8051 - How to Read the Electronic Serial Number

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ESN (Key CD) security operating procedure
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 How to read the Electronic Serial Number
1 . Turn OFF the Power.
2 . Press button [4], then the [FUNC] button, and hold
both for more than one second.
[ESN] appears on the display, followed by an eight-digit
number; this number is your electronic serial number (ESN).
You may use this number to identify your Eclipse CD8051
in the event it is recovered after being stolen.
[FUNC] button
Button [4]