S&T E1D Defender Flashlight

[Product Details] 

-Material: Aluminum alloy
-Weight: 111g
-Size: Overall length: Approx. 96mm, Center diameter: φ approx. 20.8mm, Overall width: Approx. Φ27.5mm
-Power: CR123Ax1
-Accessories: Test CR123A battery x1

It is a Surefire E1D type flashlight.
Open the front valve part and insert one CR123A and + forward.
It can be switched ON / OFF with a push switch.