Method 1: The Mighty App has multiple pre-designed graphics that you can print out with a QR containing your wallet address.
Simply print the design and post it near your POS in order to accept crypto. Your app will notify you when the payment is received successfully.
Mighty users can pay instantly, all other blockchains will rely on the blockchain speed before the payment is confirmed.
Method 2: You can generate a payment request QR code on the Mighty app. Have your customer scan the QR code and send the payment.