To track your sleep, place your Tracker fully inside the slot on the included wrist band before you get into bed. This wrist band should be worn on your non-dominant hand. Right before you start trying to fall asleep, press and hold the Tracker display button for 2-3 seconds. You will see "START" displayed on your Tracker if you have a Fitbit Classic, or if you have an Ultra you will see a stopwatch begin counting. If you press the Tracker button again, the icons for calories, steps, and distance will be flashing.
As soon as you wake up in the morning, remove the Tracker from the wrist band and press and hold the Tracker button for 2-3 seconds until you see "STOP". You can wear your Tracker as usual after that.
The next time you sync your Tracker to your Fitbit account, your sleep log should show on your Dashboard.