Features and Benefits: Compact, waterproof, durable construction withstands tough work environmentsLED has a 30,000 hour lifetime so it never needs replacedProprietary Micro Optical System (MOS) for optimized output (super bright beam) and run timeShock proof, drop test verified above the standard industry of 6 feetUnbreakable pocket clip and key ring for easy storage/attachmentStylus Pro LED pen light features a super bright, high flux, 1/2 watt LED. LED has a lifetime of up to 30,000 hours and never needs replaced. Micro Optical System (MOS) for optimized output and run time. Corrosion and waterproof construction with an unbreakable polycarbonate lens and pocket clip. Rubber push button tail cap "on-off" switching. Provides up to 24 lumens for up to 7.5 hours.