They are all relative to two features. The LED status indicator and the 15min inactivitiy automatic shut down. Holding the on/off button cycles thru the 4 modes (about 3sec each).
Normal :: LED/on & 15minAuto/on
Delayed :: LED/on & 15minAuto/off
Stealth :: LED/off & 15minAuto/on
Delayed/Stealth :: LED/off & 15minAuto/off
Here is a link to the manual. http://www.wickedairsportz.com/produ...revmanual1.pdf