I got my paypal card reader a weeks ago and began using them. I love it, it’s only 2% fees flat no other hidden charges of any kind. It accepted Visa/Master/American express through swipe. Other payments I think like check you would need to punch it in. After the swipe the buyer would have sign and then you can send receipts via email or SMS.
I think this is for for emptying your rebate cards, where you get $5 rebate $20 rebate and so on, it’s hard to spend on them because sometime item price cost would either be higher or lower and you left either cannot buy it with additional pay methods or balance of $ or $3.25 and so on. Why not use this credit card swipe card reader from Paypal. Awesome highly recommended.