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Continue to ChatBluetooth 4.2 to increase speed and security of Smart devices https://www.nfcworld.com/2014/12/08/333126/bluetooth-4-2-increase-speed-security-smart-devices/
Bluetooth 4.2 to increase speed and security of Smart devices https://www.nfcworld.com/2014/12/08/333126/bluetooth-4-2-increase-speed-security-smart-devices/