Sony ILCE-7M3 Help Manual page 324

Help Guide
Interchangeable Lens Digital Camera
ILCE-7M3
α7III
USB Power Supply
Sets whether to supply power via the USB cable when the product is connected to a computer or an USB device.
MENU → (Setup) → [USB Power Supply] → desired setting.
1
Menu item details
On:
Power is supplied to the product via a USB cable when the product is connected to a computer, etc.
Off:
Power is not supplied to the product via a USB cable when the product is connected to a computer, etc. If you use the
supplied AC Adaptor, power will be supplied even when [Off] is selected.
Note
Insert the battery pack into the product to supply power via USB cable.
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