The NiteCore EX11 is a compact, highly-portable flashlight. The CREE XP-G R5 LED provides 200 lumens of output for about an hour on a single CR123A. If you need longer runtimes, however, you can dim the light all the way down to 5 lumens and extend the runtime. The Electronically controlled Smart PD piston drive is responsive, reliable, and easy to use.

Features:

• Extremely minimal size and weight suitable for every day carry
• Fully regulated circuit, compatible with various batteries
• Instant access minimum & maximum brightness
• Impact-resistant optical lens with AR coating
• Made from 7075 military-grade aluminum
• Impact resistance: with US MIL-STD-810F
• Mil-Spec Type III Hard Anodized finish
• Aggressive knurling maximizes grip
• Electronically controlled switching
• Waterproof to IPX-8 standard
• Able to tail-stand to act as a candle

Output & Runtime: 

Primary 123A battery

• Max Output - 200 Lumens (1 hr)
• Min Output - 5 Lumens (80 hrs)
• Strobe
• SOS

Operation:

Choosing Constant Output To choose your level of constant output, first turn on the light by tightening the head or (if the head is already tightened) by pressing the tailcap once. Once on, pushing and holding the switch will cause the brightness to ramp up/down.

Choosing SOS / Strobe To choose the "hidden" SOS or Strobe modes, first turn on the light. To access SOS, quickly double-press the tailcap (do not hold it down). To access Strobe, double-press the tailcap and continue to hold down the second press. SOS and Strobe modes are not "memorized," so the light will always turn on to whatever constant output you have saved.