choice.com & choice.exe for Windows NT/2000/XP
Waits for the user to choose one of a set of choices.
If the user presses a key that is not among the keys you assigned,
Choice sounds a warning beep.
CHOICE [/C[:]choices] [/N] [/S] [/T[:]c,nn] [text]
/C[:]choices Specifies allowable keys. Default is YN
/N Do not display choices and ? at end of prompt string.
/S Treat choice keys as case sensitive.
/T[:]c,nn Default choice to c after nn seconds
text Prompt string to display
try this one
choice /C:daswnl /T:n,1 >nul