Each box comes with two incense coils that burn for 24 hours each.
Just light the coil on the end and hang up in your room or outside. Alternatively, if you have a coil burner, remove the hanging string from the top of the coil and place on top of your coil burner.
If you want to stop the incense from burn to relight later on, simply snap off the smouldering end of the coil. To reuse, pack the incense away and keep away from moisture.