Square Reader is the smallest at 56 g and 66 x 66 x 10 mm. With no PIN pad or swipe functionality, this isn’t really a surprise. The PayPal card reader weighs 118 g and measures 103 mm x 71 mm x 18 mm, but does have a keypad and swipe slot.
Payment begins by first entering an amount in the connected app or adding products from your in-app library to the cart. The card payment option is then chosen, and the app communicates with the card reader over Bluetooth (or audio plug in the case of Square Magstripe Reader) which is then ready to accept the card or mobile wallet.
Customers can enter their PIN on the PayPal Here reader’s physical PIN pad, just like on conventional EFTPOS machines.
With Square Reader, PIN entry is a little different, but nonetheless deemed secure by the payment industry. After inserting or tapping the card, a virtual PIN pad will appear on the mobile phone’s or tablet’s screen where the customer enters their PIN code.
This means you need to be ready to pass or turn the mobile device towards the customer at the point of payment, not just the card reader.