Nikon D7200 User Manual page 85

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ML-L3 Remote Controls
If you will be using an ML-L3 remote control, select a remote control
mode (Delayed remote, Quick-response remote, or Remote mirror-
up) using the Remote control mode (ML-L3) option in the photo
shooting menu (0 156). Note that if you are using an ML-L3 remote
control, pictures will be taken in "Time" mode even when "Bulb"/A
is selected for shutter speed. The exposure starts when the shutter-
release button on the remote control is pressed and ends after 30
minutes or when the button is pressed again.
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