Key features:
License type:

Retail license: This version has a retail license, so it can be installed on a single device (computer), and the activation applies to a specific computer. This type of license cannot be transferred to another device.
Applications: The Office 2019 Professional Plus package includes the following applications:

Microsoft Word (word processor)
Microsoft Excel (spreadsheet manager)
Microsoft PowerPoint (presentation creator)
Microsoft Outlook (mail, calendar, and task management)
Microsoft Access (database manager)
Microsoft Publisher (publication editor)
Skype for Business (corporate communications)
Telephone activation:

Telephone activation means that after installing Office 2019, there is no automatic online activation, but you have to contact Microsoft customer service by phone. The user must enter the activation code, which is activated on their system with the help of customer service.
Electronic License (E-License):

Electronic license means that the product is sent electronically instead of on physical media (e.g. DVD). The activation code and other necessary information are sent via email, and the user must enter them during installation.
Installation:

Office 2019 Professional Plus can only be installed on a single device, so the user can only use the programs on one computer.
The operating system must be at least Windows 10 or later to work properly.
Lifetime license:

Office 2019 is not a subscription product, so after a one-time purchase, the license remains valid forever. There are no monthly or annual fees, and the user does not have to worry about subscription renewal costs.
Updates and Support:

The product receives security updates, but does not include access to new versions, so it cannot be upgraded to Microsoft 365. Office 2019 builds on updates and fixes after purchase, but does not automatically include new versions.
Usage and Benefits:
Telephone Activation: Telephone activation gives the user the option to directly contact Microsoft customer support if they have any problems activating the product.
Long-term Use: Since this version is a one-time purchase license, there are no monthly or annual fees. The user can use the Office applications forever, as long as the device and system are compatible.
Easy Installation and Use: The simple installation process and electronic license allow for quick and seamless activation,as soon as the license code is received by the user.
Summary:
Microsoft Office 2019 Professional Plus (1 device) (Telephone Activation) (Electronic License) is an ideal choice for those who do not want to pay a subscription fee and are looking for a stable, long-term solution for using Microsoft Office applications. Telephone activation and electronic license provide a convenient way to manage the product and ensure that users have quick access to the programs they need.