Why do I need a USB Bluetooth sensor with my GateKeeper Halberd? – GateKeeper
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Token and USB Placement for Best Performance. – GateKeeper
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Gatekeeper 2.0 Remote Control for Your Computer with Military-Grade Encrypted Bluetooth Smart Key & Lock Authentication, Black 10-Pack : Amazon.in: Office Products
USB extension cables - how to use with GateKeeper. – GateKeeper