Battery type: 1 x 3.7v 2600mAh Lithium-Ion
Light source: LED
Length: 165mm
Weight (inc. batteries): 240g
Includes batteries: Yes
Features: USB rechargeable, three lighting modes (high, low and strobe), battery level indicator, also operates with CR123 lithium batteries, aluminium body, removable clip 

ANSI Specifications  

Light output (lumens): 305 (high) 30 (low)
Beam distance: 159 metres (high) 50 metres (low) 
Beam intensity (candelas): 6317 (high) 613 (low)
Run time: 3.5 hours (high) 25 hours (low)