Yes, you can use Bluetooth with a projector. There are a few ways to do this, depending on the type of projector you have. If your projector has an HDMI port, you can use a Bluetooth HDMI adapter. This will allow you to connect your projector to a Bluetooth-enabled device, such as a laptop, smartphone, or tablet. If your projector does not have an HDMI port, you can use a Bluetooth audio transmitter. This will allow you to connect your projector to a Bluetooth-enabled device, such as a smartphone or tablet. The audio will then be streamed from the device to the projector. You can also use a Bluetooth speaker with a projector. This will allow you to wirelessly stream audio from a Bluetooth-enabled device, such as a smartphone or tablet, to the projector.