MPLS Kit includes mounting hardware: ARC's, Helmet, Molle & Picatinny Switch Rail is a low-signature weapon mounted task light. Designed for navigation, signature reduction, stealth structure search and breaching operations, this light has recessed LEDs providing discreet lighting in a variety of specialty color combinations. Switch Rail attaches directly to Picatinny Rail for secure mounting A single button allows access to momentary or constant lighting modes. MADE IN USA Specifications: POOWER: 10 Lumens LAMP: 2 Ultrabright LEDs BURN TIME: 36 hours BATTERIES: 2 2016 Lithium Coin Cell WEIGHT: 0.77oz / 22g WATER RESISTANT: IPX7 WARRANTY: 1 Year