You can plug in your music device using the 3,5mm AUX/Jack cable if Bluetooth is not your preferred method of connection. The Bluetooth module is ON when the SOUNDBOKS is ON. This means that both AUX/Jack and Bluetooth connections can run simultaneously. One input will not block the other, however, it will play on top of each other. We suggest using Bluetooth at all times as this is more easily controlled. In the case of bystanders connecting to your Bluetooth, simply restart the speaker.