USPS Update for DM300c, DM400c, DM450c, DM475
Products affected: DM300c™, DM400c™, DM450c™, DM475™ (G900, G905)
1. Get update instructions by selecting your machine’s software version below. How to check your software version.
2. Once you've performed the update, it's a good idea to check that your rates were installed successfully by using the Confirm Update tool on the instruction pages.