Compact, waterproof, durable construction withstands tough work environments. LED has a 30,000 hour run time and never needs replaced. Proprietary Micro Optical System (MOS) for optimized output (Super bright beam) and run time. Shock - proof; drop test verified above the industry of 6 feet. Unbreakable pocket clip and ring for easy storage/attachment Stylus 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.