Sony MP-CL1A Startup Manual page 15

The Bluetooth mark (gray) appears on the screen, and the
projector shifts into the pairing mode.
4
Select [ Device list] in the menu.
5
Select the device you want to connect with the projector from
[Available devices] (or [Paired devices]), then select [Connect].
If passkey* entry is required, refer to the instruction manual or
manufacturer of the device.
* A Passkey may be called a "Passcode," a "PIN code," a "PIN number," or a
"Password."
6
Make sure that the Bluetooth mark color in the screen is blue.
If the mark color is gray, it means it is unconnected. In this case,
retry steps 1 and from 4 to 5.
Connected (Blue) Unconnected (Gray)
15
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