1. Confirm that your device is connected to the printer.
2. Log in to your USPS account, find the order you want to print, select “Save as PDF”, and then click “Go”.

4. Print your labels
For mobile devices:
Print labels on your phone using the “Flashlabel Pro” app. Search for “Flashlabel Pro” on the App Store or Google Play to download the app.
Alternatively, you can scan the provided QR code to download the app.

Import your PDF into the application and then print it.

Tips:
If you’re using an iPhone, tap “Save Label” and scroll down—you’ll see the “Print with FlashLabel Pro” option (see screenshot). You can print directly from here without saving the PDF or image first.

For Mac:
- In the print preview interface, select the Arrvel A812Bprinter.
- Select paper size: 4 x 6 inches
- Click Print

For Windows:
- In the print preview interface, select the Arrvel A812Bprinter.
- Select paper size: 100×150mm
- Click Print.

As a professional provider of rugged electronic devices & Printing Solutions, Arrvel is committed to delivering high-performance, durable products including rugged phones, tablets, handhelds, and universal printers to global users.