How do I set up parental controls to lock channels or programmes?
Press Quick settings > Navigation keys up > Channel > Parental Controls and press OK, then enter your PIN code if required. From there, you can lock individual channels, set programme rating restrictions, or block input sources. To watch a locked channel or programme, a 4-digit PIN code must be entered first. (Page 8-9)
From the official Sony WH-1000XM4 Wireless Noise-Canceling Headphones manual, page 8
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