Denver BFH-150 Guide D'utilisation page 5

Once the device connected to the app successfully, it will sync
your activities and sleep data automatically, please press the
touch area on the device to switch into different display modes as
following:
Time Mode
Steps
Distance
Calories
Sleep Monitor
Heart rate Monitor
Bluetooth on
Note: Long press touch area:
All manuals and user guides at all-guides.com
The fitness band can record your
sleep from 22:00 to 9:00. Sleep data
can be found in "Denver Smart Life".
ENG-3