Features
• Premium Cree XP-G R5 LED
• Powered by two AA batteries
• Aero grade aluminium alloy construction
• High performance reflector-based optic system
• Fully regulated advanced power management
• Reverse polarity protection circuit
• 2 modes of output
• AR coated scratch-resistant mineral glass lens
• Type III hard-anodized finish for corrosion and scratch resistance
• IPX-8 Waterproof (submersible up to 2 meters)
• Impact resistant to 1.5 meters

Specifications and Performance
• LED: CREE XP-G R5
• Maximum output: 270 lumens
• Maximum runtime: 35 hours
• Battery: 2*AA batteries
• Reflector: Precision aluminium reflector
• Dimensions: Diameter 23mm, length 155mm
• Weight: 71g (without battery)

Reviews:
1. The beam is clean with no artifacts and has a color temperature very close to pure white, good to see that most recent LED's are consistently producing pleasing white tints instead of the occasional blue/green hues of earlier generations. ------Meveel Lee
http://www.light-reviews.com/jetbeam_ba20/

2. The Backup series lights are well-designed, easy-to-use, two-stage lights with a good, balanced beam pattern – but with much higher output on Hi than I've seen before for this emitter type. Runtimes are also excellent at both levels, especially on Lo. A nice series of lights at attractive prices, I am sure these will do well for JetBeam.
------Selfbuilt
http://www.candlepowerforums.com/vb/showthread.php?312793