Battery Low Warning. The DECtalk Express is now setup to provide a beep at approximately every 30 seconds when its battery is at a low power level. The warning beep interval can be changed or the beep turned off. To change the beep interval, at DECtalk Express directory, the default is DTEXP, find the line that says: DTSTART "DECtalk Expressis running Version 4.2C [:power interval 30]" and change the number to the interval that you want in seconds. The beep can be turned OFF by eliminating the text "[:power intertval 30]". In either case, save the file and run the BAT file for the changes to take affect. End of File.