Rollei Profi Funk-Sender Notice D'utilisation page 30

Functions
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Here you can set the shutter speed up to 1/8000s, to synchronize the speed
with the flash .
Note: Due to internal camera settings it might be that not all function will
be shown on the display of the transmitter for every camera . Please go into
your camera settings to select the function then .
5. Bluetooth: Press the sync button for about 2 seconds to activate or
deactivate the Bluetooth function of the trigger . If Bluetooth is activated you
can connect the trigger with your smartphone by using the Rollei HS Freeze
6 app . The app is available for iOS and Android and can be downloaded in
the corresponding app store .
6. Channel: The trigger can set up to 16 wireless channels, from 00 ~ 15 .
Press the channel button shortly so that the channel number is highlighted .
Then you can adjust the channel number with the up and down buttons .
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