TP-Link Archer T2U - 1.3 Hardware Overview

Archer T2U AC600 Wireless Dual Band USB Adapter User Guide
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1.3 Hardware Overview
LED status:
Status Working Status
Off
The driver has not been installed;
The adapter's radio has been disabled.
Flashing Slowly The driver has been installed but no data is being transmitted or received.
Flashing Quickly Data is being transmitted or received.