20 Most Recent Unitech POS Keyboard K2724 (K2724-B) Questions & Answers

You didn't indicate what you are attempting to scan to, but the scanner won't just "scan" the card, it will send the data it reads to an application that is monitoring the connection from the scanner.
Verify that the scanner drivers have loaded properly and then make sure that the capture application is running and looking for the scanner connection.

i think so

check the battery connection and charge, if all is well toss it in the trash

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Keep a backup on your hard drive or a backup. The backup system is a free service supplied by your internet provider. If you use it daily or after every update, there will never be an issue.