Leapers Sub-compact LED Light and Aiming Adjustable Red Laser (LT-ELP28R) - Manual (Page 5)

Do not over tighten the Cross-bolt
Locking Knob as you could cause
damage to the main body.
!
Note: Always use the Push Buttons to turn off the light/laser FIRST
before using the Operation Selector to shut off the unit.
Note: Pressure Switch will only work when the light, the laser or both
have been “activated” by pressing their Push Buttons first.