Lumen:1000 lm(16340/18350)

Function: White light constant on

Battery:16340*1/18350*1/CR123A*1

*3.0V CR123A*1

Suitable for pistol and 20mm 1913 rail

The lumen is not constant, it will gradually dim with the power on time, and it will be constant after 5 minutes of power on

Material : aluminum alloy

Three options of cover caps of the button