What does the Bluetooth of the mini home projector do?

Connect Bluetooth speakers. The sound quality of general projectors may be poor, and music can be played by connecting a dedicated Bluetooth speaker.
Connect the mouse. In the case of remote control failure or loss, you can use the mouse to control the projector, and it is also a wireless Bluetooth mouse.
Gamepad. When using a projector to connect to PS, etc. to play games, you can connect the handle to the projector
Connect the mobile phone. Just like a mobile phone matching a car and a Bluetooth speaker, when you want to use the projector speaker, you can use the mobile phone to match the projector to play the music in the mobile phone.