Denver BFG-550 Guía De Usuario página 8

On the Sports page, long press the function key to enter a
particular sport mode.
The watch has six multi-sports: walking, running, cycling, hiking,
basketball, and football.
To exit a sport mode, long press the function key and the data is
recorded.
Note: If the sport time is less than 1mins, the data will not be
recorded.
More features
Long press the function key to enter sub-options of the "More"
page.
The options include the following features/interfaces: camera,
dial, GPS switch, reset watch, power off, and exit interface.
About
Long press the function key to show the BT Mac address, device
name and firmware version of the watch.
ENG-6