Advanced Flashlight User Interface™. The Maglite® XL100™flashlight features a push-button tail cap switch with (5) selectable modes, plus lockout (prevents accidental operation).Click here for video demo (youtube video opens in new window)Features: Normal Mode (Basic On-Off) - Adjustable Brightness with Memory,Strobe Mode - Adjustable Strobe Rate with Memory,Nite Lite™ Mode - Automatically Dims to a Low Setting,Signal Mode - User initiated signal on-off,SOS Mode - Signals International Morse Code SOS,Plus: Lockout - Prevents accidental operationNormal Operation (Basic On/Off):The XL100™flashlight is turned on by depressing and releasing the tail cap switch.