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The Charge 3 can connect to only one Bluetooth device at a time and can only be initiated through the Bluetooth button on the device itself. if you want to use a single device on it, you have the control on which device you want to use with it, and no one can connect to it through Bluetooth without the speaker being set to pairing mode on the speaker itself.
Sorry, there was a problem. Please try again later.Not sure what you mean about blocking the bluetooth but it does have 1 jack to plug in a computer or other device with a standard headphone type cord which is not included.
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