Pennsylvania Counties were required to purchase new voting machines for the 2020 elections. However, options were available and not all 67 counties need to purchase the same machine. To read more click
To find out which system your county has purchased go to https://www.votespa.com/readytovote/Pages/default.aspx#inperson and click on the county in which you live.
To learn more about machines and a tutorial scroll to the bottom of the PA Dept of State webpage at https://www.votespa.com/About-Elections/Pages/New-Voting-Systems.aspx