adyen Verifone VX820 Duet User Manual page 4

Here we describe how to set up, configure and use the
alone payment device.
VX820 Duet
If the terminal shows an exclamation at the top bar, this means that the terminal holds data which it
failed to synchronise to Adyen platform due to lack of an outgoing internet connection.
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Verifone VX820 Duet Wi-Fi payment device as a stand-