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Max Output/Runtime: 600 Lumens/3 hours.
Four output mode (Light mode: High-low-cloes. )by turning the silvery ring to switch.
Body Diametionr: 125mm (Length) 
Powered by two Li-ion 18650.
Made of durable aircraft-grade aluminum.
56-gram weight (excluding batteries)
Anti-reverse connection circuit.
Precision reflector creates smooth, optimized beam.
Coated tempered window resists impact 99% Transmission of light, protect the reflector and LED.
Weatherproof O-Ring sealed that keep moisture, dust and dirt outside of your flashlight.

Sunner Optoelctronical Limited's Warranty Policy:
We will replace products afflicted with manufacturing defects within 15 days of purchase; We will also repair a light free of charge within 24 months of purchase if problems develop with normal use; And finally our limited lifetime warranty( if repair is required after 24 months from the date of purchase, we will charge for parts. The total repair fee is according to the cost of the replaced materials).