Olight M3XS-UT Javelot LED Flashlight M3X Upgrade Tactical Weapon Kit Hunting Package with Pressure Switch, LegionArms Off-set Mount This bundle includes M3XS-UT pack and LegionArms offset mount and Pressure Switch Super Bright 1200 Lumens with 4 Output Levels & Strobe Extreme long throw reaches 1000+ yards, good for searching or hunting Quick release off-set weapon mount and M23 remote pressure switch Convenient Operation w/ Dual Switch Design.flashlight can't switch to higher beam if the batteries are not strong enough or low-level batteries.