Sony a7CR Mode D'emploi page 4

This camera is compatible with USB-PD (USB Power Delivery).
When a device compatible with USB-PD is connected to the
camera, fast charging is possible. We recommend using a
USB-PD device that is compatible with an output of 9 V/3 A
or 9 V/2 A.
Attaching a lens
Mounting indexes
Performing initial setup for the camera
By establishing a Bluetooth connection (pairing) between the
camera and a smartphone, you can perform initial camera
setup such as date and time settings from the smartphone.
Install the dedicated application on your smartphone in
advance, and then follow steps  to  under "Procedures for
initial camera setup."
Installing the dedicated smartphone application
EN
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 Mount the lens by aligning the
two white index marks (mounting
indexes) on the lens and camera.
 While pushing the lens lightly
toward the camera, turn the lens
slowly in the direction of the arrow
until it clicks into the locked position.
Install the application from the following
website. Also, update to the latest version of
the dedicated application. The specifications of
the dedicated application may change without
notice.
https://www.sony.net/ca/