The Intercharacter Delay setting in the manual applies only to RS232 (serial) and Keyboard Wedge (PS/2) cabled scanners, which are not commonly sold.

The standard USB-cabled WWS750 and WDI7500 scanners can use the USB Keyboard Speed setting, which ranges from 1ms to 10ms (and no other values are available).

See Related Pages below if you need to download the User Manual for these scanners.