The SABRE USB has an inbuilt LED that can be configured to display certain colors to represent a particular state. For example, the LED can be configured to display RED when powered via the USB port, but not connected. The LED can also be configured to display GREEN when a session has been established with a Safetrust Wallet. To confirm whether a SABRE USB is correctly configured, those with appropriate rights can search for the SABRE within Device Manager (from Windows users ) or run pcsctest from a terminal window (for Mac users).