Flashlight:Brand New & High QualityMaximum output: 500LM， 5 mode change.Color temperature : High Mode:6300K/Low Mode: 6360KOptical Cup: high-grade aluminum light cup.Flashlight Material: T6061 T6 Aircraft Aluminum.Appearance treatment: a unique black matte gun military regulations HA III oxidation.Use Battery: High capacity with protection board lithium 18650 battery (Not included) Switch: back cover switch.Water capacity: water resistant，meet the IPX-standard (not for diving lighting).Note:The battery type must be 18650 means the diameter is 18mm and the length is 650mm We have test this product if use this type battery only there is no problem when using with the bike holder ，and for some professional bike lover ，this torch is cheap ，may not meet your expection ，when buy this please consider this fact ，in case disappointing. Personally ，this product is qute perfect，considerating the material and the price .Dimensions (approx): Head diameter: 43mm， body diameter: 27mm， tail diameter: 31mm， Length:150mm.Five-mode dimming function: strong， medium， weak， Fast flash， Slow flash.Light range: light range up to 300mMain uses: rescue， adventure， camping， outdoors， patrolling， home and so on. Bicycle Flashlight Holder:Easy to mount on and take offConvenient and durableWith rubber pad to protect your handlebar from wear and tearHold the flashlight or torch on your bicycleMaterial: rubberSuitable for handlebar (approx): 18 - 22 mm in diameter， flashlight (approx): 22mm in diameterPackage Included:1 x 500lm CREE LED Q5 Flashlight Torch (Supported by 18650 battery NOT INCLUDED)1 x Bicycle Flashlight Holder/Clip