Please install the battery from the head of the light.
Function:
▲White Constant Light
▲Momentary(with tail)
Dual Output:Fix mode and Flash mode
Max Output: White light: 400 lumens 3w
Batteries type: One pieces 3V CR123A (not included)
Mount: 20mm Picatinny Rail Mount
Material: Aluminum
Length: 4.09 inches (104mm)
Bazel Diameter: 0.98 inches(25mm)
Weight: 6.70ounces(190g)
Package:
1x Flashlight
1x Tail Switch Set
1x Magic Stick