Strion® LED RECHARGEABLE PROFESSIONAL LIGHT WITH C4® LED. Streamlight Strion LED is an ultra-compact and lightweight rechargeable flashlight running on a lithium-ion battery. The Strion LED has Streamlight's C4 LED Technology and gives you 3 brightness modes plus disorienting strobe. In high, the Strion LED gives you 260 lumens and runs for up to 2 hours on a single charge - all in a flashlight that measures less than 6 long and weighs only 5.2 ounces. Anti-roll head prevents the light from rolling away when you set it down Clamp style charger holder that prevents over charge Durable machined aircraft aluminum construction