The long-life LED bulb is energy-saving, virtually unbreakable and never needs replacing 35 lumens bright LED light, long runtime of 20 hours provides excellent performance Stainless steel casing for durability Slim and sleek design Compact and lightweight, fits easily in pocket, purse and bag Tail push button for easy on/off Sturdy clip secures penlight to pocket, file or objects Powered by 2 x Energizer MAX AAA batteries included