LED: Cree XLamp XP-G3 LED with lifespan of 50,000 hours
Max output 150lumens (1*AAA battery )
Output Modes (select by twisting head)

      Mode 1:  Low       30 lms   (4hour)
      Mode 2:  Firefly   2 lms      (25hour)
      Mode 3:  High      150 lms (0.8hour)  
Working Voltage : 0.9-1.5V
Impact resistance:1.2Meters
Waterproof to IPX-8 standard
Size: 68mm(length)x14mm(head diameter)x12mm(tube diameter)
Weight: 10g (without battery)
Made of durable aircraft grade aluminum
Premium Type III hard-anodized anti-abrasive finish
Toughened ultra-clear glass lens with anti-reflective coating
Copper base plate for more efficient heat
Shiny smooth reflector and get perfect beam
Inside of each box included:

        1x M20 Flashlight  
        1x M20 nice gift package box
        2x Replacement O-rings
        1x Keychain ring  
        1x User Manual
        1x Warranty Card