Why can't the printer work with my phone?

Download “Shipping Printer Pro” app on App store or Google Play.

Allow the app access and turn on "Bluetooth" and "Location" function, for searching printer.

Tap "+" on right top corner to add printer.

Tap "PL70e-BT" to connect.

If it can't be done, it's suggested to uninstall the app, then install again.