The WEIGH-ON-THE-WAY® (W-O-W®) method increases your productivity by weighing the piece of mail and applying the correct postage as it travels through the mailing machine. You do not have to sort your mail by weight before processing.
CAUTION: Do not lean on or disturb the system while it is processing mail in this mode. It will affect the amount of postage applied to the mail piece.
If you prefer to use a different class for mail over a certain weight, you can set the system to not print postage above that weight. To do this modify the WEIGH-ON-THE-WAY® (W-O-W®) weight limit.