RearviewSafety RVS-7500 - Manual (Page 52)

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key It made up of 10 numbers from 0 to 9 and “*” “#”.
Backspace Single click will delete the last number
“+” input“+”
Phone book Single click to select phone number from phone book
Phone record Single click to select phone number from call history
Dial phone Single click to make call
4.22.7 Single click the button and then it will be in dialing as 4-47
4-47
Return Keep call state and return to main interface
Name Show the name you’re dialing